Practical skills: Edexcel International A Level Physics questions

Every Edexcel International A Level Physics exam question on Practical skills, 2019–2025, with its mark scheme and examiner’s report.

All 471 questions on Practical skills, as a list

June 2025, AS Unit 3, Q1(a)(i) (1 mark): State the resolution of the balance. (1)
June 2025, AS Unit 3, Q1(a)(ii) (2 marks): Determine the percentage uncertainty in this reading. (2) Percentage uncertainty =
June 2025, AS Unit 3, Q1(b)(i) (2 marks): Explain one technique he should use to determine accurate values for these lengths. (2)
June 2025, AS Unit 3, Q1(b)(ii) (2 marks): The student checked that the angle between the side of length a and the side of length b was a right angle. He did not have a set square or an instrument to mea
June 2025, AS Unit 3, Q1(b)(iv) (2 marks): The percentage uncertainty in this calculated value of the density of the metal is 0.9%. The accepted value for the density of copper is 8.94 g cm –3. Deduce wh
June 2025, AS Unit 3, Q2(a) (3 marks): The student marked the track at the rest position of the sphere. The student then marked the track at the start position of the sphere. She used a metre rule to
June 2025, AS Unit 3, Q2(b)(i) (2 marks): Determine the mean value of t. (2) Mean value of t =
June 2025, AS Unit 3, Q2(b)(ii) (2 marks): Determine the percentage uncertainty in the mean value of t. (2) Percentage uncertainty =
June 2025, AS Unit 3, Q2(c) (3 marks): The student investigated how varying the distance d affected the mean time t. She recorded the following data. d / cm Mean t / s 12 3.6 14.5 5.12 17 82 19.5 12.
June 2025, AS Unit 3, Q2(d) (2 marks): The student suggested using a video camera to record the motion of the sphere. Explain how using a video recording could improve the measurement of t. (2)
June 2025, AS Unit 3, Q3(a)(i) (2 marks): Explain why starting from the maximum resistance is safer than starting from the minimum resistance. (2)
June 2025, AS Unit 3, Q3(a)(ii) (2 marks): Explain whether repeat readings are appropriate for this investigation. (2)
June 2025, AS Unit 3, Q4(a) (2 marks): The student used the metre rule to determine the distance L between the level of the water and the top of the transparent cylinder. Explain how to reduce a sour
June 2025, AS Unit 3, Q4(b) (2 marks): The student connected the loudspeaker to a signal generator. She set the frequency f of the signal generator to its lowest value. The student gradually increase
June 2025, AS Unit 3, Q4(c)(ii) (5 marks): The student recorded the following data. n f / Hz 1 128 2 445 3 741 4 1020 5 1312 6 1608 Plot a graph of f on the y-axis against n on the x-axis on the grid opp
June 2025, Unit 6, Q1(a)(i) (2 marks): Describe two safety precautions the student should take when using electrolytic capacitors in a circuit. (2)
June 2025, Unit 6, Q1(b) (3 marks): The student charged the 680 µF capacitor to different potential differences, V1. For each value of potential difference V1, she connected the 680 µF capacitor t
June 2025, Unit 6, Q2(a) (6 marks): The student used temperatures ranging from 0°C to 100 °C. Devise a method the student could use to estimate a value for absolute zero. Your method should includ
June 2025, Unit 6, Q2(b) (3 marks): The student suggested that using a data logger with a temperature probe and a pressure sensor would improve the investigation. Explain how using a data logger c
June 2025, Unit 6, Q3(a) (2 marks): The student used a micrometer screw gauge to measure the thickness of one glass slide. She recorded a single measurement as 1.21 mm. Explain why a micrometer sc
June 2025, Unit 6, Q3(b) (2 marks): For each value of w the student recorded the potential difference V across the solar cell. Explain one variable she should control in this investigation. (2)
June 2025, Unit 6, Q3(c)(i) (2 marks): Explain how a graph of ln V against w could be used to determine a value for B. (2)
June 2025, Unit 6, Q3(c)(ii) (5 marks): The student recorded the following results. w / mm V / mV 1.21 381 2.46 375 4.88 366 6.10 361 8.55 352 10.97 344 Plot a graph of ln V against w on the grid oppo
June 2025, Unit 6, Q3(c)(iii) (3 marks): Determine the gradient of the graph. (3) Gradient =
June 2025, Unit 6, Q3(c)(iv) (4 marks): The mean thickness of each glass slide was 1.22 mm. Determine the minimum number of glass slides needed to reduce V to 75% of the initial value. (4) Minimum num
June 2025, Unit 6, Q4(a)(i) (3 marks): Explain why timing multiple oscillations improves the measurement of T. (3)
June 2025, Unit 6, Q4(a)(ii) (2 marks): Describe two techniques the student should use when timing oscillations. (2)
June 2025, Unit 6, Q4(a)(iii) (2 marks): The student recorded the following results. 10T / s 6.88 6.93 6.84 6.96 Calculate the mean value of T. (2) Mean value of T =
June 2025, Unit 6, Q4(a)(iv) (2 marks): Determine the percentage uncertainty in the mean value of T. (2) Percentage uncertainty =
June 2025, Unit 6, Q4(b)(i) (2 marks): The student used vernier calipers to measure d. Explain one technique he should use to determine an accurate value for d. (2)
June 2025, Unit 6, Q4(b)(ii) (3 marks): Show that the percentage uncertainty in the term D is about 2%. 2 2 d D = 59.4 mm ± 0.2 mm d = 13.9mm ± 0.1 mm (3)
June 2025, Unit 6, Q4(b)(iii) (2 marks): The student determined the value of the constant N experimentally and estimated its percentage uncertainty. He determined the value of v as 0.276 with a percent
January 2025, AS Unit 3, Q1(a) (2 marks): The student measured the length l of the toy car using digital calipers. Determine the percentage uncertainty in the measurement of l. (2) Percentage uncertaint
January 2025, AS Unit 3, Q1(b)(i) (2 marks): Determine the mean value of t. (2) Mean value of t =
January 2025, AS Unit 3, Q1(b)(ii) (2 marks): Determine the percentage uncertainty in the mean value of t. (2) Percentage uncertainty in mean value of t =
January 2025, AS Unit 3, Q2(a)(i) (4 marks): Describe a method the student could use to determine an accurate value for the maximum force a beam can support. You should include the use of any additional ap
January 2025, AS Unit 3, Q2(a)(ii) (2 marks): Identify a health and safety issue with your method and how the issue may be dealt with. (2)
January 2025, AS Unit 3, Q2(b)(i) (2 marks): Criticise the recording of these results. (2)
January 2025, AS Unit 3, Q2(b)(ii) (2 marks): The student concluded that the increase in maximum force was proportional to the mass of fibre in the beam. Explain how the student could justify his conclusion
January 2025, AS Unit 3, Q3(a)(i) (1 mark): Suggest what the student should do to control the background light during the investigation. (1)
January 2025, AS Unit 3, Q3(a)(ii) (2 marks): Suggest two other variables the student should control during this investigation. (2)
January 2025, AS Unit 3, Q3(b)(i) (4 marks): Calculate the missing values for Pout and % efficiency. (4) Pout = mW Efficiency = %
January 2025, AS Unit 3, Q3(b)(ii) (3 marks): The student plotted a graph of % efficiency against θ. 30 29 28 % efficiency 27 26 25 30 40 50 60 70 80 θ / Determine the maximum % efficiency of the arrangemen
January 2025, AS Unit 3, Q3(c) (3 marks): Explain how the student could collect more data to increase the accuracy in her values of maximum % efficiency and θmax. (3)
January 2025, AS Unit 3, Q4(a)(i) (2 marks): Complete the table with corresponding values of sin θ. Use the additional column to record your processed data. (2)
January 2025, AS Unit 3, Q4(a)(ii) (5 marks): Plot a graph of f on the y-axis against sin θ on the x-axis on the grid opposite. (5)
January 2025, AS Unit 3, Q4(c)(i) (3 marks): Determine the value of v using your graph. λ = 650 nm (3) v =
January 2025, AS Unit 3, Q4(c)(ii) (2 marks): The student is told that the liquid is either petroleum, castor oil or glycerol. The table shows the speed of sound v in these liquids. Liquid v / m s –1 petrol
January 2025, Unit 6, Q1(a) (2 marks): The student used the immersion heater to heat the water in the beaker. Identify one health and safety issue and how it should be dealt with. (2)
January 2025, Unit 6, Q1(b) (3 marks): The student determined the temperature θ of the fixed volume of air. Describe an accurate method to determine a single value of θ. (3)
January 2025, Unit 6, Q1(c)(i) (1 mark): Determine the mean value of θ. (1) Mean θ =
January 2025, Unit 6, Q1(c)(ii) (2 marks): Determine the percentage uncertainty in the mean value of θ. (2) Percentage uncertainty =
January 2025, Unit 6, Q2(a) (2 marks): Complete the circuit diagram for the circuit the student could use in this investigation. (2)
January 2025, Unit 6, Q2(b) (6 marks): The student placed a light sensor a distance from the filament bulb. The light sensor measured X, the light received, in lux, from the filament bulb. She predic
January 2025, Unit 6, Q3(a) (2 marks): Give two reasons why it would not be appropriate to record A to the nearest mm. (2)
January 2025, Unit 6, Q3(b)(i) (2 marks): Explain how a graph of ln A against n can be used to determine the value of λ. (2)
January 2025, Unit 6, Q3(b)(ii) (5 marks): The student recorded the following results. n A / cm 5 8.5 10 7.0 15 5.5 20 5.0 25 4.0 30 3.5 Plot a graph of ln A against n on the grid opposite. Use the addit
January 2025, Unit 6, Q3(b)(iii) (3 marks): Determine the value of λ from the graph. (3) λ =
January 2025, Unit 6, Q3(b)(iv) (3 marks): Determine the value of A0 from the graph. (3) A0 =
January 2025, Unit 6, Q3(b)(v) (2 marks): Explain why the value of A0 determined from the graph may not be the true value of A0. (2)
January 2025, Unit 6, Q4(a) (3 marks): The student used a metre rule to measure the heights h1 and h2 . She calculated the difference in height ∆h as 21 mm ± 1 mm. Explain why it was appropriate to r
January 2025, Unit 6, Q4(b) (3 marks): The student placed a small glass sphere at marker 1. She released the sphere and used a stopwatch to measure the time t taken for the sphere to reach marker 2.
January 2025, Unit 6, Q4(c)(i) (2 marks): Determine the student’s value of g. (2) g =
January 2025, Unit 6, Q4(c)(ii) (3 marks): Show that the percentage uncertainty in the student’s value of g is about 7%. (3)
January 2025, Unit 6, Q4(c)(iii) (2 marks): Deduce whether the student’s value of g is accurate. (2)
October 2024, AS Unit 3, Q1(a)(i) (2 marks): The student recorded a single measurement of d as 12.7 mm. Determine the percentage uncertainty in this measurement. (2) Percentage uncertainty =
October 2024, AS Unit 3, Q1(a)(ii) (2 marks): The student repeated the measurements of d at different orientations and calculated the mean. Explain another technique she should use to determine an accurate
October 2024, AS Unit 3, Q1(b) (4 marks): The student placed the steel sphere in a transparent tube filled with the liquid. She arranged the transparent tube as shown. Not to scale rubber bung transpare
October 2024, AS Unit 3, Q1(c) (2 marks): The student determined the viscosity of the liquid as 0.72 Pa s with a percentage uncertainty of 6%. The viscosity of castor oil is 0.65 Pa s. Deduce whether th
October 2024, AS Unit 3, Q2(a)(i) (2 marks): Complete the diagram to show the circuit the student should use for this investigation. (2) X Y R sealed box
October 2024, AS Unit 3, Q3(a) (3 marks): The student filled the tall beaker with water. He used a metre rule to measure the depth h1 of the water. Describe an accurate method to determine a single valu
October 2024, AS Unit 3, Q3(b) (3 marks): The student placed a steel nail at the bottom of the beaker. He viewed the search pin and the image of the steel nail from above while adjusting the height of t
October 2024, AS Unit 3, Q3(c)(i) (2 marks): Determine the mean value of n. (2) Mean value of n =
October 2024, AS Unit 3, Q3(c)(ii) (2 marks): Determine the percentage uncertainty in the mean value of n. (2) Percentage uncertainty =
October 2024, AS Unit 3, Q4(b)(i) (5 marks): Plot a graph of K on the y-axis against L on the x-axis on the grid opposite. (5)
October 2024, AS Unit 3, Q4(b)(ii) (3 marks): Determine the gradient of the graph. (3) Gradient =
October 2024, Unit 6, Q1(a) (2 marks): The student varied the temperature of the diode from room temperature to 100 °C using the apparatus shown. wires connected to circuit thermometer beaker diode w
October 2024, Unit 6, Q1(b) (2 marks): The student connected the diode in the circuit shown. 6 V A 100 Ω 1 kΩ V He used the ammeter to measure the current as he varied the temperature of the diode. E
October 2024, Unit 6, Q1(c)(i) (3 marks): Explain whether the unit for current in the table is correct for this data. You should include a suitable calculation. (3)
October 2024, Unit 6, Q1(c)(ii) (2 marks): Give two reasons why this data cannot be used to test the student’s prediction. (2)
October 2024, Unit 6, Q2(a)(i) (2 marks): Determine the mean value of the period T. (2) Mean value of T =
October 2024, Unit 6, Q2(a)(ii) (2 marks): Determine the percentage uncertainty in the mean value of T. (2) Percentage uncertainty =
October 2024, Unit 6, Q2(a)(iii) (3 marks): The student measured the time for multiple oscillations and calculated the mean. Describe three other techniques she should use to obtain an accurate value for
October 2024, Unit 6, Q2(b) (6 marks): The student modified the apparatus to investigate damped oscillations of the mass‑spring system. She placed a circular piece of card between the masses to act a
October 2024, Unit 6, Q3(a) (2 marks): Explain how a graph of log L against log M can be used to determine the M value of r. (2)
October 2024, Unit 6, Q3(b)(i) (6 marks): Plot a graph of log L against log M on the grid opposite. M Use the additional columns for your processed data. Do not convert the values of L from 10 35 W to
October 2024, Unit 6, Q3(b)(ii) (3 marks): Determine the value of r from the graph. (3) r =
October 2024, Unit 6, Q3(b)(iii) (3 marks): Determine the value of L from the graph. (3) L =
October 2024, Unit 6, Q3(b)(iv) (2 marks): A particular main sequence star has a mass of 33 M. Determine the luminosity L of this star. (2) L =
October 2024, Unit 6, Q4(a) (2 marks): The student used digital calipers to measure a. Explain one technique she should use to measure a. (2)
October 2024, Unit 6, Q4(b)(i) (3 marks): The student increased D and measured 20 T several times again. Explain how increasing D affects the percentage uncertainty in the measurement of 20 T. (3)
October 2024, Unit 6, Q4(b)(ii) (2 marks): The student recorded the following data. M = 400 g D = 0.800 m ± 0.001 m a = 25.02 mm ± 0.05 mm b = 6.17 mm ± 0.02 mm T = 0.62 s ± 0.01 s Show that E is about 1
October 2024, Unit 6, Q4(b)(iii) (3 marks): Show that the percentage uncertainty in E is about 5%. (3)
October 2024, Unit 6, Q4(b)(iv) (2 marks): The value of E for beech wood is 11.9 GPa. Deduce whether the metre rule could be made from beech wood. (2)
June 2024, AS Unit 3, Q1(a)(i) (4 marks): Identify two health and safety issues and how they should be dealt with. (4)
June 2024, AS Unit 3, Q1(a)(ii) (2 marks): Describe a method the student could use which would not include a force meter. You should include the use of additional apparatus. (2)
June 2024, AS Unit 3, Q1(b) (2 marks): The student investigated how the breaking force of the rubber bands changed at low temperature. The student placed five identical rubber bands in a freezer at –
June 2024, AS Unit 3, Q2(a)(i) (1 mark): State one control variable for this investigation. (1)
June 2024, AS Unit 3, Q2(a)(ii) (2 marks): Explain why it is necessary to control this variable. (2)
June 2024, AS Unit 3, Q2(b) (3 marks): The student recorded the following data to plot a graph of θ against x. θ / ° x / cm 10 35.8 20.5 592 31 61 Criticise the recording of the data. (3)
June 2024, AS Unit 3, Q2(c) (2 marks): The student wrote a laboratory report about her investigation. She reported that the most significant source of error was being unable to judge the exact point
June 2024, AS Unit 3, Q3(a) (3 marks): The student added water to the transparent tube to change the length s of the air column. Describe a method to determine a single value of s as accurately as po
June 2024, AS Unit 3, Q3(c)(i) (2 marks): Determine the mean value of v. (2) Mean value of v =
June 2024, AS Unit 3, Q3(c)(ii) (2 marks): Determine the percentage uncertainty in the mean value of v. (2) Percentage uncertainty =
June 2024, AS Unit 3, Q3(d) (2 marks): The student modified the apparatus to determine the speed of sound in water. –1 with a 4% uncertainty. He determined the speed of sound in water to be 1444 m s
June 2024, AS Unit 3, Q4(a)(i) (2 marks): The student recorded a single measurement of d as 0.27 mm. Determine the percentage uncertainty in this measurement. (2) Percentage uncertainty =
June 2024, AS Unit 3, Q4(a)(ii) (2 marks): The student repeated the measurement of d at different positions and orientations and calculated the mean. Explain another technique she should use to determine
June 2024, AS Unit 3, Q4(b) (2 marks): The student formed the wire into a loop. She used the circuit below to determine the resistance between two points, X and Y, on the loop. fixed resistor A V loo
June 2024, AS Unit 3, Q4(c)(ii) (2 marks): The student recorded the following data. R L / m I / A V / V L 0.100 0.720 1.40 0.200 0.390 1.39 0.300 0.290 1.42 0.400 0.250 1.48 0.500 0.220 1.47 0.600 0.210
June 2024, AS Unit 3, Q4(c)(iii) (5 marks): Plot a graph of R L on the y-axis against L on the x-axis on the grid opposite. (5)
June 2024, AS Unit 3, Q4(c)(iv) (3 marks): Determine the value of k from the graph. (3) k =
June 2024, Unit 6, Q1(a) (2 marks): State two safety precautions the student should take when connecting and using the circuit. (2)
June 2024, Unit 6, Q1(b) (3 marks): The student used the switch in position 1 to charge the capacitor. The student changed the switch to position 2 to discharge the capacitor through the motor. As
June 2024, Unit 6, Q1(c)(i) (1 mark): Calculate the mean value of h. (1) Mean value of h =
June 2024, Unit 6, Q1(c)(ii) (2 marks): Determine the percentage uncertainty in the mean value of h. (2) Percentage uncertainty =
June 2024, Unit 6, Q2(b) (6 marks): The student used a metre rule to measure L and a stopwatch to measure t. He adjusted the water tap to give a constant flow of water. Describe a method to determ
June 2024, Unit 6, Q2(c) (2 marks): The mass balance can be connected to a data logger. The data logger records the mass shown on the balance. Give two reasons why using a data logger would improv
June 2024, Unit 6, Q3(a) (3 marks): The student used a stopwatch to determine the time period T of the rotational oscillations. Describe how the student should determine an accurate value for T. (
June 2024, Unit 6, Q3(b)(i) (2 marks): Explain how a graph of log T against log M can be used to determine the value of b. (2)
June 2024, Unit 6, Q3(b)(ii) (6 marks): The student varied M and determined the corresponding values of T. She recorded the following data. M / kg T / s 0.200 1.46 0.300 1.86 0.400 2.14 0.500 2.36 0.6
June 2024, Unit 6, Q3(b)(iii) (3 marks): Determine the gradient of the graph. (3) Gradient =
June 2024, Unit 6, Q3(b)(iv) (3 marks): Determine the value of a. (3) a =
June 2024, Unit 6, Q4(a)(i) (2 marks): The student used a micrometer screw gauge to measure the thickness t of the plastic protractor. Explain one technique she should use when measuring t. (2)
June 2024, Unit 6, Q4(a)(ii) (2 marks): The student determined a value of t as 1.41 mm. Explain why a micrometer screw gauge is an appropriate instrument for this measurement. Your answer should inclu
June 2024, Unit 6, Q4(b)(i) (2 marks): Show that V is about 6.2 cm 3. (2)
June 2024, Unit 6, Q4(b)(ii) (4 marks): Show that the uncertainty in V is about 0.2 cm 3. (4)
June 2024, Unit 6, Q4(c) (2 marks): The student determined the density of the plastic as 1.04 g cm –3 with a percentage uncertainty of 3%. The accepted value of the density of Perspex is 1.18 g cm
January 2024, AS Unit 3, Q1(a)(i) (1 mark): State the resolution of the balance. (1)
January 2024, AS Unit 3, Q1(a)(ii) (2 marks): Determine the percentage uncertainty in the mass of the stack of paper. (2) Percentage uncertainty =
January 2024, AS Unit 3, Q1(b) (2 marks): The student used vernier calipers to measure the thickness y of the stack of paper. Explain one technique he should use to determine an accurate value for y. (2
January 2024, AS Unit 3, Q1(c)(i) (2 marks): Determine the density of the paper in g cm x = 210 mm y = 42.7 mm z = 297 mm (2) –3 Density = g cm
January 2024, AS Unit 3, Q1(c)(ii) (2 marks): Explain why making measurements on the whole stack of paper is better than making measurements on a single sheet of paper. (2)
January 2024, AS Unit 3, Q2(a) (2 marks): The motor was connected in a circuit including a battery and a switch. The student connected additional components to determine the power of the motor. Complete
January 2024, AS Unit 3, Q2(b)(i) (4 marks): Describe how she should measure a single value of the height gained as accurately as possible. You should include the use of any additional apparatus needed. (4
January 2024, AS Unit 3, Q2(b)(ii) (2 marks): Explain why repeat measurements are appropriate for this measurement. (2)
January 2024, AS Unit 3, Q3(a) (2 marks): Identify a health and safety issue caused by using a laser and how this issue may be dealt with. (2)
January 2024, AS Unit 3, Q3(b)(i) (2 marks): The student used a metre rule to measure the distance between adjacent minima. Describe how the student should determine an accurate value for the distance betw
January 2024, AS Unit 3, Q3(b)(ii) (2 marks): Explain how the student could modify the arrangement of the apparatus to reduce the percentage uncertainty in this value. (2)
January 2024, AS Unit 3, Q3(c)(i) (2 marks): Determine the mean value of d. (2) Mean value of d =
January 2024, AS Unit 3, Q3(c)(ii) (2 marks): Determine the percentage uncertainty in the mean value of d. (2) Percentage uncertainty =
January 2024, AS Unit 3, Q3(d) (2 marks): In a different experiment, the student applied force to stretch the hair. He determined the average breaking stress for hair as 181 MPa with a percentage uncert
January 2024, AS Unit 3, Q4(a) (4 marks): Explain how two sources of error can be reduced in this investigation. (4)
January 2024, AS Unit 3, Q4(b)(i) (2 marks): Explain why a graph of I against d should be a straight line through the origin. 2 (2)
January 2024, AS Unit 3, Q4(b)(ii) (2 marks): The student varied d and recorded corresponding values of I. She recorded the results in the table as shown. –2 d / m I / W m 0.125 996 0.175 510 0.250 276 0.37
January 2024, AS Unit 3, Q4(b)(iii) (5 marks): Plot a graph of I on the y-axis against d on the x-axis on the grid opposite. 2 (5)
January 2024, AS Unit 3, Q4(b)(iv) (3 marks): Determine the value of k from the graph. (3) k =
January 2024, AS Unit 3, Q4(b)(v) (2 marks): The student switched off the filament bulb. She recorded the intensity of the background light as 4 W m –2. The student then switched on the filament bulb. She
January 2024, Unit 6, Q1(b)(iii) (2 marks): Explain why your value of f0 may not be accurate. (2)
January 2024, Unit 6, Q1(c) (2 marks): The student suggested that a motion sensor and data logger, arranged as shown, would improve the experiment. stand vibration generator signal spring generator b
January 2024, Unit 6, Q2(a) (2 marks): The student used the hot plate to heat the water until it boiled. He moved the glass beaker onto the heatproof mat to allow the water to cool. Identify one safe
January 2024, Unit 6, Q2(b) (6 marks): The student suggested that the relationship between the temperature θ of the water and time t is –bt θ = θ0e where θ0 is the initial temperature of the water an
January 2024, Unit 6, Q3(a) (3 marks): Describe an accurate method to measure a single value of x using a 30 cm ruler. You should include any additional apparatus. (3)
January 2024, Unit 6, Q3(b) (2 marks): The student predicted that the relationship between F and x was of the form F = kx p where k and p are constants. Explain how a graph of log F against log x can
January 2024, Unit 6, Q3(c)(i) (6 marks): Plot a graph of log F against log x on the grid opposite. Use the additional columns for your processed data. (6)
January 2024, Unit 6, Q3(c)(ii) (3 marks): Determine the gradient of the graph. (3) Gradient =
January 2024, Unit 6, Q3(c)(iii) (3 marks): The student suggested that the relationship between F and x is an inverse square relationship. Explain whether the graph supports this suggestion. (3)
January 2024, Unit 6, Q4(a)(i) (2 marks): The student used vernier calipers to measure the diameter d. Explain one technique she should use to measure d. (2)
January 2024, Unit 6, Q4(a)(ii) (2 marks): The student estimated that the thickness t of the centre of the lens was approximately 5 mm. Explain the most appropriate instrument the student should use for
January 2024, Unit 6, Q4(b) (4 marks): The student placed the circular convex lens in a holder. She set up the apparatus, as shown. screen filament bulb u v circular convex lens wire mesh holder The
January 2024, Unit 6, Q4(c)(i) (2 marks): Determine the value of n. (2) n =
January 2024, Unit 6, Q4(c)(ii) (2 marks): Determine the percentage uncertainty in n. (2) Percentage uncertainty in n =
January 2024, Unit 6, Q4(c)(iii) (2 marks): The refractive index of crown glass is 1.52 Deduce whether the lens could be made of crown glass. (2)
October 2023, AS Unit 3, Q1(a) (1 mark): Identify a suitable measuring instrument for these measurements. (1)
October 2023, AS Unit 3, Q1(b) (1 mark): The student noticed that the uncertainty in the mean width is larger than the uncertainties in the mean length and the mean height. Suggest why the uncertainty
October 2023, AS Unit 3, Q1(c) (2 marks): Determine the percentage uncertainty in the mean length. (2) Percentage uncertainty =
October 2023, AS Unit 3, Q1(d)(ii) (3 marks): The student is told the cube is made from copper, bronze or brass. The table shows the densities of these metals. Metal Density / kg m –3 copper 8940 bronze 862
October 2023, AS Unit 3, Q2(a) (4 marks): Describe how the student could determine accurate values of x and R. (4)
October 2023, AS Unit 3, Q2(b) (1 mark): The student measured values of x and corresponding values of R and plotted a graph of his measurements. 2.00 1.50 R / mΩ 1.00 0.50 0.00 0.00 0.05 0.10 0.15 0.20
October 2023, AS Unit 3, Q3(a) (4 marks): The student had a metre rule and a stopwatch. Describe how the student could determine accurate values for d and v. (4)
October 2023, AS Unit 3, Q3(b)(i) (2 marks): Describe how the student could use a graph to determine a value of k. (2)
October 2023, AS Unit 3, Q3(b)(ii) (1 mark): She determined the speed v of the wave for three depths d of water. She calculated the value of k for each depth. d / mm v / m s –1 k / m s –2 7.5 0.265 9.36 11
October 2023, AS Unit 3, Q3(b)(iii) (3 marks): The student suggested that the value of k should be equal to the gravitational field strength. Discuss whether it is likely that k is the gravitational field st
October 2023, AS Unit 3, Q4(a)(i) (6 marks): Plot a graph of Emax on the y-axis against 1/λ on the x-axis on the grid opposite. Use the additional column of the table for your processed data. (6)
October 2023, AS Unit 3, Q4(a)(iii) (4 marks): Determine a value of h. (4) h =
October 2023, AS Unit 3, Q4(a)(iv) (2 marks): Calculate the percentage difference between h and the accepted value for the Planck constant. (2) Percentage difference =
October 2023, AS Unit 3, Q4(b) (4 marks): The student’s investigation involves a small random error and a large systematic error. For each of these, suggest a source of the error and a realistic modific
October 2023, Unit 6, Q1(a) (2 marks): Describe one safety issue and how it should be dealt with. (2)
October 2023, Unit 6, Q1(b) (2 marks): Complete the circuit diagram for this investigation. (2) copper wire
October 2023, Unit 6, Q1(c) (4 marks): The student plotted a graph of his readings as shown. 1.2 1.0 0.8 0.6 m / g 0.4 0.2 0.0 0 1 2 3 4 5 6 I / A The relationship between m and I is given by BL m
October 2023, Unit 6, Q2(b) (6 marks): The student used a stopwatch to determine T. Describe a method, using the pendulum, to obtain a value for H. Your method should use a suitable graph. (6)
October 2023, Unit 6, Q2(c) (2 marks): Explain how a video recording may improve the method. (2)
October 2023, Unit 6, Q3(a) (2 marks): Explain why a graph of ln P against h can be used to determine a value for b. (2)
October 2023, Unit 6, Q3(b)(i) (5 marks): Plot a graph of ln P against h on the grid opposite. Use the additional column for your processed data. (5)
October 2023, Unit 6, Q3(b)(ii) (3 marks): Determine the gradient of the graph. (3) Gradient =
October 2023, Unit 6, Q3(b)(iii) (3 marks): The gradient of the graph is given by gradient = − Mg kT where M = mass of one air molecule k = Boltzmann constant T = 288 K Determine a value for M. (3) M =
October 2023, Unit 6, Q3(b)(iv) (3 marks): The lowest point on dry land is 414 m below sea level. Determine the value of P for this point. (3) P =
October 2023, Unit 6, Q4(a)(i) (2 marks): Explain one technique she should use to measure t. (2)
October 2023, Unit 6, Q4(a)(ii) (1 mark): The student recorded the following measurements. t / mm 1.02 1.06 1.05 1.01 Calculate the mean value of t in mm. (1) Mean value of t = mm
October 2023, Unit 6, Q4(a)(iii) (2 marks): Determine the percentage uncertainty in t. (2) Percentage uncertainty in t =
October 2023, Unit 6, Q4(a)(iv) (2 marks): Folding the rubber band and measuring the total thickness of four layers would reduce the percentage uncertainty in t. Explain the effect of folding the rubber
October 2023, Unit 6, Q4(a)(v) (2 marks): The student used a metre rule to measure the length x and used the micrometer screw gauge to measure the width w of the rubber band. She determined the volume o
October 2023, Unit 6, Q4(b)(i) (2 marks): Show that the uncertainty in D D = 3.45 cm ± 0.01 cm (2)
October 2023, Unit 6, Q4(b)(ii) (2 marks): Show that the uncertainty in A is about 0.05 cm 2 = 9.36 cm 2 ± 0.06 cm 2 d 2 ± 0.07 cm 2 Dd = 10.56 cm (2)
October 2023, Unit 6, Q4(c) (3 marks): The student determined the density of the rubber band and the density of the rubber bung. She also determined the corresponding percentage uncertainty in each v
June 2023, AS Unit 3, Q1(a)(i) (1 mark): State the value of t shown on the micrometer. (1) t =
June 2023, AS Unit 3, Q1(a)(ii) (2 marks): Determine the percentage uncertainty in this value of t. (2) Percentage uncertainty in t =
June 2023, AS Unit 3, Q1(a)(iii) (2 marks): Explain how she should reduce a source of error in this measurement of t. (2)
June 2023, AS Unit 3, Q1(b) (4 marks): The student balanced the ruler on a pivot as shown, and recorded the position of the centre of gravity of the ruler. centre of gravity ruler bench pivot The stu
June 2023, AS Unit 3, Q2(a)(i) (2 marks): Explain the purpose of the convex lens. (2)
June 2023, AS Unit 3, Q2(a)(ii) (2 marks): The power supply provided a constant 12 V potential difference across the filament bulb. Describe two more ways to keep the light intensity incident on the sola
June 2023, AS Unit 3, Q2(b)(i) (2 marks): Add to the diagram to show how an ammeter and a voltmeter should be connected in the circuit. (2)
June 2023, AS Unit 3, Q2(b)(ii) (1 mark): Suggest a reason for using a fixed resistor in the circuit. (1)
June 2023, AS Unit 3, Q3(a)(i) (2 marks): Give two reasons why vernier calipers are more appropriate for these measurements than a transparent ruler. (2)
June 2023, AS Unit 3, Q3(a)(ii) (2 marks): Describe how the student should measure the diameter of a ring as accurately as possible. (2)
June 2023, AS Unit 3, Q3(b)(i) (2 marks): Determine the mean value of a in m (2) Mean value of a = m 2 V
June 2023, AS Unit 3, Q3(b)(ii) (2 marks): Determine the percentage uncertainty in the mean value of a. (2) Percentage uncertainty in the mean value of a =
June 2023, AS Unit 3, Q3(b)(iii) (2 marks): A different student repeated the investigation using six values of V. She plotted a 1 graph of V against 2 and determined the constant a from the gradient. λ Gi
June 2023, AS Unit 3, Q3(c)(ii) (2 marks): The percentage uncertainty in the calculated value of h is 6%. Comment on the accuracy of your calculated value of h. (2)
June 2023, AS Unit 3, Q4(a) (2 marks): Identify a health and safety issue and how it may be dealt with. (2)
June 2023, AS Unit 3, Q4(b)(i) (2 marks): Identify two sources of uncertainty with this method. (2)
June 2023, AS Unit 3, Q4(b)(ii) (1 mark): Suggest a modification to reduce the effect of one of these sources of uncertainty. (1)
June 2023, AS Unit 3, Q4(c)(i) (2 marks): Explain why a graph of cos 2 Δx can be used to determine a value for g. (2)
June 2023, AS Unit 3, Q4(c)(ii) (6 marks): The student recorded the following data. θ cos 2 Δx / m 0.938 0.165 0.926 0.169 0.911 0.175 0.902 0.178 0.891 0.183 θ on the y‑axis against 1 Plot a graph o
June 2023, AS Unit 3, Q4(c)(iii) (3 marks): Determine the gradient of the graph. (3) Gradient =
June 2023, Unit 6, Q1(a) (3 marks): Describe a simple method to determine the volume flow rate of the water moving out of the tube. (3)
June 2023, Unit 6, Q1(b) (3 marks): A student connected the tube to the water flow device shown below. A magnet is attached to the paddle wheel. magnet coil paddle wheel water from tube As water f
June 2023, Unit 6, Q1(c) (3 marks): Describe how the student could investigate how f varies with the volume flow rate of the water. (3)
June 2023, Unit 6, Q1(d) (2 marks): The student disconnected the water tank and oscilloscope from the water flow device. The student placed the water flow device in a river to monitor the flow of
June 2023, Unit 6, Q2(a) (2 marks): State two safety precautions for this investigation. (2)
June 2023, Unit 6, Q2(b)(i) (2 marks): Explain why a graph of ln C against x could be used to test the validity of this relationship. (2)
June 2023, Unit 6, Q2(b)(ii) (6 marks): Devise a plan to obtain the data required to test the validity of this relationship. (6)
June 2023, Unit 6, Q3(a) (3 marks): Describe an accurate method to determine a single value of d using a 15 cm ruler. You should include any additional apparatus. (3)
June 2023, Unit 6, Q3(b)(i) (6 marks): Plot a graph of log d against log L on the grid opposite. Use the additional columns for your processed data. (6)
June 2023, Unit 6, Q3(b)(ii) (3 marks): Determine the gradient of the graph. (3) Gradient =
June 2023, Unit 6, Q3(b)(iii) (3 marks): It is suggested that for a given load, the relationship between d and L is of the form r d = k L where r and k are constants. Determine the value k from the gra
June 2023, Unit 6, Q4(a)(i) (2 marks): Describe two other techniques she should use to determine T. (2)
June 2023, Unit 6, Q4(a)(ii) (3 marks): She recorded the following measurements. 5T / s 3.43 3.36 3.28 3.49 Calculate the mean value of T and its uncertainty in seconds. (3) Mean value of T = s ± s
June 2023, Unit 6, Q4(b) (2 marks): The student estimated that the diameter of the test tube was approximately 2 cm. Explain why vernier calipers are a suitable instrument to measure the diameter.
June 2023, Unit 6, Q4(c)(i) (2 marks): Show that ρ is about 1200 kg m –3. D = 2.38 cm ± 0.01 cm T = 0.61 s ± 0.01 s m = 48.95 g (2)
June 2023, Unit 6, Q4(c)(ii) (3 marks): Show that the percentage uncertainty in ρ is about 4%. (3)
June 2023, Unit 6, Q4(c)(iii) (2 marks): The density of glycerol is 1260 kg m –3. Deduce whether the liquid could be glycerol. (2)
January 2023, AS Unit 3, Q1(a)(i) (1 mark): State the resolution of the ohmmeter. (1)
January 2023, AS Unit 3, Q1(a)(ii) (2 marks): Determine the percentage uncertainty in the measurement of R. (2) Percentage uncertainty =
January 2023, AS Unit 3, Q1(b)(i) (4 marks): Describe how the student could determine an accurate value for the thickness of the graphite pencil shading. The method should use a suitable graph. (4)
January 2023, AS Unit 3, Q1(b)(ii) (1 mark): Identify a possible source of systematic error in your method. (1)
January 2023, AS Unit 3, Q2(a)(ii) (2 marks): Identify a health and safety issue for the student and how it may be dealt with. (2)
January 2023, AS Unit 3, Q2(c)(i) (2 marks): To determine an accurate value for the speed of sound, the student would need to use other apparatus. Explain what other apparatus the student would need. (2)
January 2023, AS Unit 3, Q3(a)(i) (2 marks): The value of l0 was 5.2 cm. Explain why a metre rule is an appropriate instrument for this measurement. (2)
January 2023, AS Unit 3, Q3(a)(ii) (2 marks): The student added a load to the spring and measured the stretched length l of the spring, as shown. support spring l metre rule load Describe two techniques the
January 2023, AS Unit 3, Q3(b)(i) (1 mark): Criticise the recording of these results. (1)
January 2023, AS Unit 3, Q3(b)(ii) (2 marks): The student plotted the graph shown opposite. Explain which value he should check. (2) 0.8 0.7 0.6 0.5 W / N 0.4 0.3 0.2 0.1 0 4 5 6 7 8 9 10 11 12 13 14 15 16
January 2023, AS Unit 3, Q3(c)(ii) (2 marks): The student estimated the percentage uncertainty in his calculated value of the density of modelling clay to be 4%. The density of polymer clay is 1760 kg m –3.
January 2023, AS Unit 3, Q4(a)(i) (2 marks): Determine the mean value of time in s. (2) Mean value of time = s
January 2023, AS Unit 3, Q4(a)(ii) (2 marks): Determine the percentage uncertainty in the mean value of time. (2) Percentage uncertainty =
January 2023, AS Unit 3, Q4(b) (2 marks): The student adjusted the launching device to vary the mean force F applied to the car. For larger values of F there was a greater percentage uncertainty in the
January 2023, AS Unit 3, Q4(c)(i) (2 marks): Explain why a graph of F against v can be used to determine a value for t. (2)
January 2023, AS Unit 3, Q4(c)(ii) (5 marks): The student recorded the following results. F / N v / m s –1 0.5 0.28 1.5 0.84 2.5 1.40 3.5 1.97 4.5 2.52 Plot a graph of F on the y axis against v on the x axi
January 2023, AS Unit 3, Q4(c)(iii) (3 marks): Determine a value for t using the gradient of your graph. M = 0.125 kg (3) t =
January 2023, Unit 6, Q1(a) (2 marks): Identify one safety issue and how it may be dealt with. (2)
January 2023, Unit 6, Q1(b)(i) (2 marks): Criticise the recording of the results. (2)
January 2023, Unit 6, Q1(b)(ii) (1 mark): State one variable that should be controlled for this experiment. (1)
January 2023, Unit 6, Q2(a)(ii) (6 marks): The student used a stopwatch to determine T for different values of M. Devise a plan to test the validity of the relationship between T2 and M. The method shoul
January 2023, Unit 6, Q2(b) (2 marks): The student suggested that using a video recording of the motion would improve the determination of T. Comment on this suggestion. (2)
January 2023, Unit 6, Q3(a) (2 marks): The relationship between the maximum displacement angle θ and number of oscillations n is given by θ = θ0e–λn where θ0 is the initial displacement angle and λ i
January 2023, Unit 6, Q3(b)(i) (5 marks): Plot a graph of ln θ against n on the grid opposite. Use the additional column for your processed data. (5)
January 2023, Unit 6, Q3(b)(ii) (3 marks): Determine the value of λ from the graph. (3) λ =
January 2023, Unit 6, Q3(b)(iii) (3 marks): The student claimed that the initial displacement angle was greater than 180 °. Deduce whether this claim is correct. (3)
January 2023, Unit 6, Q4(a)(i) (2 marks): Explain one technique she should use to reduce the uncertainty in the measurement of d. (2)
January 2023, Unit 6, Q4(a)(ii) (3 marks): She recorded the following measurements. d / mm 8.53 8.56 8.55 8.53 Determine the mean value of d and its uncertainty in mm. (3) Mean value of d = mm ± mm
January 2023, Unit 6, Q4(b)(i) (3 marks): Show that the uncertainty in d2 is about 1 mm2. d = 10.70 mm ± 0.06 mm (3)
January 2023, Unit 6, Q4(b)(ii) (4 marks): Show that the percentage uncertainty in A is about 0.4 %. s2 = 881 mm2 ± 2 mm2 (4)
January 2023, Unit 6, Q4(c) (2 marks): The student measured the total mass m10 of 10 identical metal rings as 63 g. Explain why measuring the total mass of 10 metal rings is better than measuring the
January 2023, Unit 6, Q4(d)(i) (2 marks): Determine the mean density ρ, in g cm–3, of the metal the ring is made from. m10 = 63.0 g ± 0.5 g x10 = 14.03 mm ± 0.04 mm A = 602 mm2 ± 0.4 % (2) ρ = g cm–3
January 2023, Unit 6, Q4(d)(ii) (3 marks): The density of stainless steel ranges from 7.48 g cm–3 to 7.95 g cm–3. Deduce whether the metal rings could be made from stainless steel. (3)
October 2022, AS Unit 3, Q1(a)(i) (2 marks): Determine an accurate value for the length of the card. (2) Length of card =
October 2022, AS Unit 3, Q1(a)(ii) (2 marks): Calculate the percentage uncertainty in your value. (2) Percentage uncertainty =
October 2022, AS Unit 3, Q1(c) (3 marks): In the experiment, the student applied a small force with her hand to start glider A moving. The student repeated the experiment and calculated the mean values
October 2022, AS Unit 3, Q1(d) (2 marks): Another student used a stopwatch to measure the time taken for the gliders to travel a known distance. Explain the advantage of using light gates and a data log
October 2022, AS Unit 3, Q2(b)(i) (3 marks): The student wrote the following conclusion. The resistivity of the salt solution is inversely proportional to the mass of salt dissolved in the sample. Explain
October 2022, AS Unit 3, Q2(b)(ii) (2 marks): Give two reasons why the graph may not support the student’s conclusion. (2)
October 2022, AS Unit 3, Q3(a)(i) (3 marks): Describe a method to measure u and v. (3)
October 2022, AS Unit 3, Q3(a)(ii) (2 marks): Identify a possible source of uncertainty in the measurement of u, and how it can be dealt with. (2)
October 2022, AS Unit 3, Q4(a) (2 marks): Criticise the recording of these results. (2)
October 2022, AS Unit 3, Q4(b) (5 marks): Using the grid opposite, plot a graph of d on the y-axis against F on the x-axis. (5)
October 2022, AS Unit 3, Q4(c)(ii) (2 marks): Determine the gradient of your graph. (2) Gradient =
October 2022, AS Unit 3, Q4(d) (2 marks): The student’s teacher suggested that using a plastic beam with a smaller value of h would improve the measurement of d. Justify the teacher’s statement. (2)
October 2022, AS Unit 3, Q4(e) (2 marks): The student suggested repeating the investigation using a glass rod instead of a plastic beam. Explain a safety issue that would be caused by using a glass rod.
October 2022, Unit 6, Q1(a) (2 marks): Describe one safety issue and how it should be dealt with. (2)
October 2022, Unit 6, Q1(b) (3 marks): The distance r between the two coils varied between 2 cm and 10 cm. Explain why using Vernier calipers would be better than a metre rule to measure r. You shoul
October 2022, Unit 6, Q1(c) (3 marks): When the a.c. power supply was switched on, an e.m.f. E was induced across coil B. The variation in E is shown on the oscilloscope screen below. one division Th
October 2022, Unit 6, Q1(d) (2 marks): The student measured values of r with Vernier calipers and determined corresponding maximum values of E. The student’s values are shown in the table. r / cm 2 4
October 2022, Unit 6, Q2(a) (2 marks): Explain why a graph of ln V against t should be used to test this relationship. (2)
October 2022, Unit 6, Q2(b) (4 marks): A student investigates the relationship between V and t. Describe how the student could obtain an accurate set of values for V and t to test this relationship.
October 2022, Unit 6, Q2(c) (2 marks): Explain a source of uncertainty in this investigation. (2)
October 2022, Unit 6, Q3(a)(i) (6 marks): Plot a graph of log P against 1 T on the grid opposite. Use the additional columns for your processed data. (6)
October 2022, Unit 6, Q3(a)(ii) (3 marks): Determine the gradient of the graph. (3) Gradient =
October 2022, Unit 6, Q3(a)(iii) (3 marks): The gradient of the graph of log P against 1 T is given by X gradient = – k 2 30 . where X is a constant with unit joules, and k is the Boltzmann constant. Dete
October 2022, Unit 6, Q3(b) (3 marks): Liquids boil when the saturated vapour pressure is equal to atmospheric pressure. Determine the boiling point of the liquid in °C when the atmospheric pressure
October 2022, Unit 6, Q4(a)(i) (2 marks): Explain one measuring technique he should use. (2)
October 2022, Unit 6, Q4(a)(ii) (3 marks): The student recorded the following measurements. dX / mm 0.31 0.32 0.31 0.33 0.30 Determine the mean value of dX and its uncertainty in mm. (3) Mean value of dX
October 2022, Unit 6, Q4(b)(ii) (3 marks): Show that the percentage uncertainty in ρ is about 9%. (3)
October 2022, Unit 6, Q4(c) (3 marks): The student measured the resistances R1 and R2 of different lengths of wire Y using an ohmmeter. Each resistance was measured once. The student’s values are giv
October 2022, Unit 6, Q4(d) (3 marks): The student wanted to confirm that the metal of the wire is constantan. The student compared his calculated values of ρ and RL to published values for constanta
June 2022, AS Unit 3, Q1(a) (4 marks): Determine the average volume of one of the coins. (4) Average volume =
June 2022, AS Unit 3, Q1(c) (2 marks): Determine whether the coins could be made from brass. density of brass = 8550 kg m–3 ± 2% (2)
June 2022, AS Unit 3, Q1(d) (4 marks): The surfaces of the coins are uneven, which introduces a systematic error. Describe an alternative method the student could have used to determine the average v
June 2022, AS Unit 3, Q2(a) (3 marks): When the measured value of θ1 is 35°, the measured value of θ2 is 62°. Calculate the percentage uncertainty in each of these values. (3) Percentage uncertainty
June 2022, AS Unit 3, Q2(c) (2 marks): The line of best fit on the graph does not pass through the origin. Describe a possible cause for this error, and how the student could reduce the effect of thi
June 2022, AS Unit 3, Q3(a) (2 marks): The student determined R using a circuit that included an ammeter and a voltmeter. Draw a circuit the student could have used. (2)
June 2022, AS Unit 3, Q3(b) (3 marks): She varied I by varying the distance d between the LDR and a filament bulb. Describe a method the student could have used to obtain accurate values for R and d.
June 2022, AS Unit 3, Q3(e)(i) (1 mark): Identify one control variable in this investigation. (1)
June 2022, AS Unit 3, Q3(e)(ii) (1 mark): State how this variable can be controlled. (1)
June 2022, AS Unit 3, Q4(b) (2 marks): The student derived the following equation for the relationship between D and H 2 2 v 2 D = g H where v is the horizontal velocity of the sphere at the end of t
June 2022, AS Unit 3, Q4(c)(i) (6 marks): Plot a graph of D2 on the y‑axis against H on the x‑axis. Use the additional column of the table for your processed data. (6)
June 2022, AS Unit 3, Q4(c)(ii) (3 marks): The gradient of the graph is equal to 2 2 v g Determine the value of v using your graph. (3) v = m s–1
June 2022, AS Unit 3, Q4(c)(iii) (2 marks): The student used a light gate and data logger to measure v. The measured value was 1.98 m s–1. Comment on the value of v determined using your graph. (2)
June 2022, Unit 6, Q1(a)(i) (1 mark): State the resolution of the thermometer in °C. (1)
June 2022, Unit 6, Q1(a)(ii) (2 marks): The student heated the liquid. He started a stopwatch and recorded the temperature of the liquid. He recorded the time at fixed intervals of temperature, as the
June 2022, Unit 6, Q1(b)(i) (1 mark): State another control variable that would allow him to compare the specific heat capacities for the two liquids. (1)
June 2022, Unit 6, Q1(c) (2 marks): Another student performed the investigation using a temperature probe connected to a data logger. Give two reasons why this would improve the investigation. (2)
June 2022, Unit 6, Q2(a) (6 marks): The time taken for the amplitude of one pendulum to change from zero to a maximum and back to zero again is P. It is suggested that the relationship between P a
June 2022, Unit 6, Q2(b) (2 marks): A student recorded the motion of the pendulums using a video camera. Suggest how this may improve the measurement of P. (2)
June 2022, Unit 6, Q3(a) (2 marks): The relationship between the atomic number Z and the frequency f of the most intense spectral line is given by Z = k f n where k and n are constants. Explain wh
June 2022, Unit 6, Q3(b)(i) (6 marks): Plot a graph of log Z against log f on the grid opposite. Use the additional columns for your processed data. You should not convert the values of f from 1015 H
June 2022, Unit 6, Q3(b)(ii) (3 marks): Determine the value of n. (3) n =
June 2022, Unit 6, Q3(b)(iii) (3 marks): Determine the value of k using your graph. (3) k =
June 2022, Unit 6, Q3(c) (2 marks): A scientist named Henry Moseley suggested that Z µ f 0.5 Explain whether the graph supports this suggestion. (2)
June 2022, Unit 6, Q4(a)(i) (4 marks): She made one measurement in cm using Vernier calipers and one measurement in mm using digital calipers. The photographs show the measurements. Explain why the d
June 2022, Unit 6, Q4(a)(ii) (2 marks): The student determined a more accurate value for d. Explain one technique she could have used. (2)
June 2022, Unit 6, Q4(a)(iii) (3 marks): The student recorded the following measurements. d / mm 6.57 6.58 6.54 6.52 Determine the mean value of d and its uncertainty in mm. (3) Mean value of d = mm ±
June 2022, Unit 6, Q4(b) (4 marks): The student was given a different size metal nut. She measured the distances shown. d s She calculated the shaded area A of the metal using the formula 2 s2 – π
June 2022, Unit 6, Q4(c)(i) (2 marks): Determine the density ρ of the metal from which the nut is made. (2) ρ =
June 2022, Unit 6, Q4(c)(ii) (3 marks): The density of steel ranges from 7.85 g cm–3 to 8.03 g cm–3. Deduce whether the metal nut could be made from steel. (3)
January 2022, AS Unit 3, Q1(b)(i) (3 marks): Calculate the mean value for v and the percentage uncertainty in v. (3) Mean v = m s–1 Percentage uncertainty in v = %
January 2022, AS Unit 3, Q1(b)(iii) (1 mark): A second student carried out the same experiment and determined a similar value for the acceleration of the trolley on the ramp. State why this does not show th
January 2022, AS Unit 3, Q2(c) (1 mark): The LDR is connected to the ohmmeter using two connecting wires. The ohmmeter reading includes the resistance of the two connecting wires. State why the student
January 2022, AS Unit 3, Q3(a) (2 marks): Describe how the student could determine θ using a metre rule. (2)
January 2022, AS Unit 3, Q3(b) (1 mark): Describe how the student could check that the bracket was horizontal. (1)
January 2022, AS Unit 3, Q3(c) (3 marks): The student adjusted the position of the mass and measured x. For each value of x the student made corresponding measurements of F using a force meter. The resu
January 2022, AS Unit 3, Q3(d)(ii) (2 marks): The value of g obtained from the graph is 9.64 m s–2. The student concluded that the value of g obtained is accurate. Evaluate the student’s conclusion. (2)
January 2022, AS Unit 3, Q4(a)(i) (6 marks): Plot a graph of R on the y-axis against 1 / w on the x-axis. Use the additional column of the table for your processed data. (6)
January 2022, AS Unit 3, Q4(b)(i) (2 marks): Explain why this method gives a value for t with low uncertainty. (2)
January 2022, AS Unit 3, Q4(b)(ii) (2 marks): The value of t obtained using this method was 0.80 mm with an uncertainty of 2%. Deduce whether this value is consistent with the value of t obtained from the g
January 2022, AS Unit 3, Q5(b) (2 marks): The student tried the same experiment using a rubber hammer. The rubber hammer compressed as it hit the wood making a sound that lasted for a longer time. Expla
January 2022, AS Unit 3, Q5(c) (2 marks): The student was given the following equation and data to find a value for the speed of sound in oak. E v = ρ Young modulus E of oak = 11.2 GPa ± 0.5 GPa Density
January 2022, Unit 6, Q1(b) (2 marks): The student suggested placing the apparatus in a beaker of boiling water and allowing the water to cool. Boiling water is a hazard. Explain one other reason why
January 2022, Unit 6, Q1(c)(i) (2 marks): State two techniques that should be used to ensure the measurement of θ is as accurate as possible. (2)
January 2022, Unit 6, Q1(c)(ii) (3 marks): The student recorded the following measurements. θ / °C l / cm 19.0 16.0 35.0 16.9 49.0 17.7 The student predicted that a graph of l against θ could be used to
January 2022, Unit 6, Q2(a) (6 marks): The student had a large number of copper tubes of different lengths x. He predicted that the magnet would fall with constant acceleration a inside the copper tu
January 2022, Unit 6, Q2(b) (2 marks): Explain a possible source of error in this investigation. (2)
January 2022, Unit 6, Q3(a) (2 marks): State two precautions that should be taken when using this source. (2)
January 2022, Unit 6, Q3(c) (2 marks): The corrected count rate C varies over time t according to the relationship C = C0 e−λt where C0 is the initial count rate and λ is the decay constant. Explain
January 2022, Unit 6, Q3(d)(i) (5 marks): Plot a graph of ln C against t on the grid opposite. Use the additional column in the table to record your processed data. (5)
January 2022, Unit 6, Q4(a)(i) (2 marks): The student measured the height h1 of the start line from the bench using a metre rule. State two precautions she should take to ensure the measurement is as ac
January 2022, Unit 6, Q4(a)(ii) (2 marks): The student measured the height h2 of the finish line. She recorded the difference in height Δh between the start line and finish line as 65 mm ± 1 mm. Explain
January 2022, Unit 6, Q4(b)(i) (2 marks): Calculate the mean value of t and its uncertainty. (2) Mean value of t = ±
January 2022, Unit 6, Q4(b)(ii) (2 marks): The student made the ramp less steep by reducing the value of h1. Explain how this might improve the measurement of t. (2)
January 2022, Unit 6, Q4(c) (4 marks): Two students each carried out this procedure for another value of Δh. They recorded the following times for the same value of Δh. Student t / s Mean t / s A 2.4
January 2022, Unit 6, Q4(d)(i) (2 marks): Determine a value for g. (2) g =
January 2022, Unit 6, Q4(d)(ii) (2 marks): Determine the percentage uncertainty in the value of g. (2) Percentage uncertainty =
January 2022, Unit 6, Q4(d)(iii) (2 marks): Deduce whether the value of g is accurate. (2)
October 2021, AS Unit 3, Q1(a) (2 marks): Describe how the student was able to vary the temperature θ of the thermistor for this investigation. (2)
October 2021, AS Unit 3, Q1(b) (2 marks): The photograph shows the steady reading of V on the voltmeter when the thermistor was at room temperature. (Source: PAL) Calculate the percentage uncertainty in
October 2021, AS Unit 3, Q1(c)(i) (2 marks): Estimate the value of V for a temperature of 0 °C. (2)
October 2021, AS Unit 3, Q1(d) (2 marks): The student suggested that V is inversely proportional to temperature measured in kelvin. Determine whether she is correct. (2)
October 2021, AS Unit 3, Q3(a) (4 marks): Describe a method to determine the maximum force the nylon fishing line can withstand before breaking. (4)
October 2021, AS Unit 3, Q3(b) (2 marks): Identify one safety issue with this investigation and how it may be dealt with. (2)
October 2021, AS Unit 3, Q3(c)(i) (3 marks): Calculate the percentage uncertainty in the mean diameter of the nylon fishing line. (3) Percentage uncertainty =
October 2021, AS Unit 3, Q4(a)(i) (2 marks): Criticise these results. (2)
October 2021, AS Unit 3, Q4(a)(ii) (5 marks): Plot a graph of r on the y-axis and h on the x-axis. (5)
October 2021, AS Unit 3, Q4(c) (3 marks): The student researched the range of values for the coefficients of restitution e of different metals. stainless steel 0.63 < e < 0.93 cast iron 0.3 < e < 0.6 De
October 2021, Unit 6, Q1(a)(i) (2 marks): Identify two other control variables for this investigation. (2)
October 2021, Unit 6, Q1(a)(ii) (3 marks): The student recorded the following data. I / A 1.5 2 2.5 3 ∆θ 3.5 7 9.5 15 Criticise the recording of this data. (3)
October 2021, Unit 6, Q1(b) (2 marks): Explain one improvement the student could make to reduce the uncertainty in the measurement of ∆θ for each value of I. (2)
October 2021, Unit 6, Q2(b) (6 marks): A student suggests that an approximate relationship between T and h is given by π 2 2 = g (2l − h) T Devise a plan to test the validity of the relationship usin
October 2021, Unit 6, Q2(c) (3 marks): Another student suggests determining T by setting up a light gate attached to a data logger. Discuss whether this modification would improve the investigation.
October 2021, Unit 6, Q3(a) (4 marks): Describe how the student should use the oscilloscope to identify the resonant frequency and determine its value. (4)
October 2021, Unit 6, Q3(b)(i) (6 marks): Plot a graph of log f against log V on the grid opposite. Use the additional columns in the table to record your processed data. (6)
October 2021, Unit 6, Q3(b)(ii) (5 marks): It is suggested that the relationship between f and V is given by − 1 f = kV 2 where k is a constant. Discuss whether the graph supports this suggestion. (5)
October 2021, Unit 6, Q4(a)(i) (2 marks): Describe two techniques she should use when measuring p and q. (2)
October 2021, Unit 6, Q4(a)(ii) (2 marks): The difference between p and q was recorded as 26 mm ± 1 mm. Explain why the uncertainty in this value is given as 1 mm. (2)
October 2021, Unit 6, Q4(b)(i) (2 marks): Explain the most appropriate instrument the student should use to measure d. (2)
October 2021, Unit 6, Q4(b)(ii) (2 marks): Explain one technique that she should use to measure d. (2)
October 2021, Unit 6, Q4(b)(iii) (2 marks): She recorded the following measurements. d / mm 2.35 2.37 2.34 2.35 2.33 Calculate the mean value of d in mm and its uncertainty. (2) Mean value of d = mm ± mm
October 2021, Unit 6, Q4(c) (2 marks): The shear modulus G is a measure of a material’s resistance to bending, and is given by 32 mglx 2 G = π yd 4 where m is the mass attached to the end of the rod
October 2021, Unit 6, Q4(d) (4 marks): The table shows values of G for different types of steel. Type of steel Structural steel Carbon steel G / 109 N m−2 79.3 77.0 Deduce whether the data provided i
June 2021, AS Unit 3, Q1(a) (1 mark): To determine the density of acetate, the student needed to take measurements. Complete the table below. (1) Quantity to be measured Measuring instrument Resolut
June 2021, AS Unit 3, Q1(b) (4 marks): Describe a method to determine an accurate value for the density of acetate. (4)
June 2021, AS Unit 3, Q1(c) (2 marks): The student then followed the same method using thicker sheets of acetate. Explain why using thicker sheets of acetate would reduce the uncertainty in her value
June 2021, AS Unit 3, Q2(a) (2 marks): Suggest two reasons for the variation in the lengths the student measured. (2)
June 2021, AS Unit 3, Q2(b)(i) (2 marks): Calculate the mean value of l. (2) Mean value of l =
June 2021, AS Unit 3, Q2(b)(ii) (2 marks): Calculate the percentage uncertainty in l. (2) Percentage uncertainty =
June 2021, AS Unit 3, Q2(d) (2 marks): The percentage uncertainty in the student’s value for the speed of sound is equal to the percentage uncertainty in l. The accepted value for the speed of sound
June 2021, AS Unit 3, Q3(a) (3 marks): The student measured the diameter of the sphere using a micrometer. 45 0 5 10 15 40 35 Calculate the percentage uncertainty in the diameter of the sphere shown
June 2021, AS Unit 3, Q3(b) (1 mark): State one precaution that should be taken before using a micrometer. (1)
June 2021, AS Unit 3, Q3(d) (4 marks): The resolution of the force meter was 0.01 N. The distance moved between the rubber bands was 25.0 cm. The time measured was 0.78 s. The percentage uncertainty
June 2021, AS Unit 3, Q4(b)(i) (2 marks): Complete the table with the corresponding values of 1/λ. (2)
June 2021, AS Unit 3, Q4(b)(ii) (5 marks): Plot a graph of Va on the y-axis against 1/λ on the x-axis. (5)
June 2021, AS Unit 3, Q4(b)(iii) (3 marks): Determine the value of the Planck constant given by the student’s data. (3) Planck constant =
June 2021, AS Unit 3, Q4(b)(iv) (2 marks): The student states that the value for the Planck constant obtained from the graph is accurate. Evaluate the student’s statement. (2)
June 2021, Unit 5, Q14(b) (2 marks): In some experiments, it is an advantage to use a data logger rather than other measuring instruments. Describe when the use of a data logger is an advantage. (2
June 2021, Unit 6, Q1(a) (3 marks): As the wheel rotates, a series of pulses is displayed as shown. 1 division oscilloscope screen Describe how a value of the time period should be determined from
June 2021, Unit 6, Q2(a) (6 marks): Devise a plan to determine the value of L using a graphical method. You should include a circuit diagram and any additional apparatus required. (6)
June 2021, Unit 6, Q2(b) (3 marks): One significant source of error in this experiment is the uncertainty in the mass reading due to the water moving as it boils. Explain how another significant s
June 2021, Unit 6, Q3(a)(i) (2 marks): Describe how he should modify the equipment to make his measurements as accurate as possible. (2)
June 2021, Unit 6, Q3(a)(ii) (2 marks): Describe two techniques he should use to reduce the uncertainty in the value of the time period. (2)
June 2021, Unit 6, Q3(b)(i) (6 marks): Plot a graph of log T against log M on the grid opposite. Use the additional columns in the table to record your processed data. (6)
June 2021, Unit 6, Q4(a)(i) (1 mark): The student had a set of Vernier calipers and a micrometer screw gauge, as shown in the photograph. State, with a reason, which of these measuring instruments s
June 2021, Unit 6, Q4(a)(ii) (2 marks): The student recorded the following values of d, measured at different points across the lens. 5.10 cm 5.11 cm 5.10 cm She concluded that because her measurement
June 2021, Unit 6, Q4(b) (2 marks): The student measured the thickness x of the edge of the lens using the micrometer screw gauge. She recorded the following measurements. x / mm 2.11 2.10 2.13 2.
June 2021, Unit 6, Q4(c)(i) (2 marks): Determine the value of n. d = 5.10 cm ± 0.01 cm t = 8.30 mm ± 0.01 mm f = 9.8 cm ± 0.3 cm (2) n =
June 2021, Unit 6, Q4(c)(ii) (2 marks): Show that the percentage uncertainty in (t – x) is approximately 0.5%. (2)
June 2021, Unit 6, Q4(c)(iii) (4 marks): Show that the uncertainty in d2 + (t – x)2 is approximately 0.11 cm. (4)
June 2021, Unit 6, Q4(c)(iv) (3 marks): The table shows data for some materials used to make lenses. Material Pyrex Crown glass Flint glass Refractive index 1.47 1.52 1.66 Deduce whether this lens cou
January 2021, AS Unit 3, Q1(b)(i) (2 marks): Plot the remaining points and add a line of best fit. (2)
January 2021, AS Unit 3, Q1(b)(ii) (1 mark): The student concludes that these results do not show that the acceleration of the glider is directly proportional to the force. Comment on the student’s conclus
January 2021, AS Unit 3, Q2(b) (2 marks): The student repeated the process for a second semicircular block of a different transparent material. Her measured value for C was 41 ± 0.5° Calculate the range
January 2021, AS Unit 3, Q2(d) (3 marks): The student used rays of white light. Explain why using monochromatic light would increase the validity of the conclusion made in (c). (3)
January 2021, AS Unit 3, Q2(e) (3 marks): The photograph shows a spectrometer. This can be used to measure angles when investigating refraction. collimator transparent material telescope Vernier scale L
January 2021, AS Unit 3, Q4(a) (1 mark): Calculate the percentage uncertainty in the measurement of the potential difference. (1) Percentage uncertainty =
January 2021, AS Unit 3, Q4(b) (3 marks): The student could use a digital multimeter. OFF V~ 1000 750 V 200 200 20 µ 200 A 2000 2000 µ m 200 20 m m 200 m 2000 k 10 A 200 Ω 20 k 2000 200 10A DC Va mA 750
January 2021, AS Unit 3, Q5(a) (2 marks): Criticise these results. (2)
January 2021, AS Unit 3, Q5(b) (5 marks): Plot a graph of resistance on the y-axis against temperature on the x-axis. (5)
January 2021, AS Unit 3, Q5(c) (6 marks): The relationship between the temperature T and the resistance R of the copper wire is given by R = αR0T + R0 where R0 is the resistance of the wire at 0 °C and
January 2021, AS Unit 3, Q5(d) (2 marks): Explain one modification to this investigation that would improve the accuracy of the values of R0 and α determined in (c). (2)
January 2021, Unit 6, Q1(a) (3 marks): Describe how the time period of the oscillations should be measured to make the readings as accurate as possible. (3)
January 2021, Unit 6, Q1(b) (2 marks): Describe how a single measure of D should be made accurately. (2)
January 2021, Unit 6, Q1(c) (3 marks): A student determined the time period T for different values of the distance D. She obtained the following results. D / m 0.235 0.335 0.445 T / s 0.78 0.94 1.09
January 2021, Unit 6, Q2(b) (1 mark): State one safety precaution the student should take. (1)
January 2021, Unit 6, Q2(d) (2 marks): The student repeated the investigation but used a data logger instead of a stopwatch and an ammeter. Suggest why using a data logger would improve this investig
January 2021, Unit 6, Q3(a) (2 marks): Explain why a graph of log r against log A can be used to determine a value for n. (2)
January 2021, Unit 6, Q3(b)(i) (6 marks): Plot a graph of log r against log A on the grid. Use the additional columns in the table to record your processed data. You should not convert the values of r t
January 2021, Unit 6, Q3(b)(ii) (2 marks): Use your graph to determine the value of n. (2) n =
January 2021, Unit 6, Q3(b)(iii) (3 marks): Determine the value of r0 and hence state the mathematical relationship between r and A. (3)
January 2021, Unit 6, Q4(a) (2 marks): The students need to make measurements to determine the volume of the transparent material. The external diameter of the container is approximately 10 cm. Stude
January 2021, Unit 6, Q4(b)(i) (2 marks): Explain two techniques that could be used to make sure this measurement is as accurate as possible. (2)
January 2021, Unit 6, Q4(b)(ii) (2 marks): The following measurements were obtained. t / mm 2.15 2.06 2.13 2.08 2.10 Calculate the mean value of t in mm and its uncertainty. . (2) mean t = mm ± mm
January 2021, Unit 6, Q4(c)(i) (2 marks): Calculate the value of C in cm. x = 25.8 cm ± 0.2 cm (2) C = cm
January 2021, Unit 6, Q4(c)(ii) (1 mark): Show that the uncertainty in C is approximately 0.2 cm. (1)
January 2021, Unit 6, Q4(d) (4 marks): The volume V of the transparent material is given by 2 C L – Vi V = 4π where L is the length of the container and Vi is the internal volume of the container. De
January 2021, Unit 6, Q4(e) (4 marks): The table shows the densities of some common materials used to manufacture this type of container. Only borosilicate is safe to heat directly with a Bunsen burn
October 2020, Unit 6, Q1(a) (1 mark): The air track provides a cushion of air which reduces friction between the gliders and the track. Describe how the student would show that the air track is hori
October 2020, Unit 6, Q1(c) (3 marks): Another student suggested that using a piece of card twice as long would improve the investigation. Assess this suggestion. (3)
October 2020, Unit 6, Q2 (6 marks): A student wrote the following plan to investigate the distance travelled by alpha particles in air. Place the Geiger-Müller tube in front of the source. Measure
October 2020, Unit 6, Q3(a) (3 marks): Describe how the time period of these oscillations should be measured to make the readings as accurate as possible. (3)
October 2020, Unit 6, Q3(b)(ii) (2 marks): Explain why plotting a graph of log T against log I would test the validity of this relationship. (2)
October 2020, Unit 6, Q3(c)(i) (6 marks): Plot a graph of log T against log I on the grid opposite. Use the additional columns in the table to record your processed data. (6)
October 2020, Unit 6, Q3(c)(ii) (3 marks): Use your graph to determine a value for n. (3) n =
October 2020, Unit 6, Q3(c)(iii) (4 marks): After plotting the graph, the student modified his prediction. He suggested that the relationship between T and I is T = kI n where k is a constant. Justify thi
October 2020, Unit 6, Q4(a)(i) (1 mark): State the most appropriate measuring instrument for the student to use to measure the width a and the length b of the slot. (1)
October 2020, Unit 6, Q4(a)(ii) (2 marks): Explain one technique she should use when measuring a and b. (2)
October 2020, Unit 6, Q4(a)(iii) (3 marks): Calculate the area of the slot and its uncertainty in cm2. Assume the slot is rectangular. a = 0.47 ± 0.01 cm b = 2.19 ± 0.005 cm (3) Area of the slot = ± cm2
October 2020, Unit 6, Q4(b)(i) (2 marks): Calculate the shaded area of the slotted mass in cm2. (2) Shaded area = cm2
October 2020, Unit 6, Q4(b)(ii) (3 marks): Calculate the uncertainty in the value of the shaded area. (3) Uncertainty = cm2
October 2020, Unit 6, Q4(c)(ii) (3 marks): Calculate the percentage uncertainty in the value of ρ. (3) Percentage uncertainty =
October 2020, Unit 6, Q4(d) (2 marks): The student thinks that the slotted mass is made from brass, which has a density of 8.5 g cm−3. Determine whether the slotted mass could be made of brass. (2)
January 2020, AS Unit 3, Q1(a) (4 marks): Draw a labelled diagram showing how she could carry out this investigation using school laboratory apparatus. (4)
January 2020, AS Unit 3, Q1(b) (2 marks): Identify one safety issue with this investigation and how it may be dealt with. (2)
January 2020, AS Unit 3, Q2(b) (3 marks): The student marked the position of the water surface on the beaker for different values of m. He plotted a graph of d in cm against m in g. 7 6 5 4 3 2 1 0 0 50
January 2020, AS Unit 3, Q2(c) (2 marks): The graph shows that the beaker would have a depth under the water surface with no mass added. Identify the source of the systematic error and how it could be c
January 2020, AS Unit 3, Q3(c) (4 marks): The relationship between the refractive index n, the angle of incidence θ1 and the angle of refraction θ2 is given by the equation sin θ1 = n sin θ2 Describe a
January 2020, AS Unit 3, Q3(d)(i) (3 marks): The uncertainty in the measurement of the angles was ± 0.5°. Calculate the maximum and minimum values of n. (3) Maximum value of n = Minimum value of n =
January 2020, AS Unit 3, Q3(d)(ii) (2 marks): Calculate the percentage uncertainty in the student’s value of n. (2) Percentage uncertainty =
January 2020, AS Unit 3, Q4(a) (2 marks): Criticise these results. (2)
January 2020, AS Unit 3, Q4(c) (5 marks): Plot a graph of change in gravitational potential energy on the y-axis against mean energy supplied on the x-axis. (5)
January 2020, AS Unit 3, Q4(d) (2 marks): Determine the efficiency of the motor. (2) Efficiency =
January 2020, AS Unit 3, Q4(e) (3 marks): The students repeated the experiment with a much larger mass and determined that the efficiency of the motor was decreased. Describe how they should collect and
January 2020, AS Unit 3, Q5(a) (2 marks): A teacher is given a sample of the same material with diameter 1 mm. Justify the teacher’s decision that it would be safe for her students to determine the brea
June 2019, AS Unit 3, Q1(a)(i) (1 mark): State the resolution of the measuring instrument shown in the photograph. (1)
June 2019, AS Unit 3, Q1(a)(ii) (2 marks): Explain why this device is suitable to measure the diameter of the metal sphere. (2)
June 2019, AS Unit 3, Q1(b) (1 mark): The student measured the diameter. The reading obtained was 20.5 ± 0.05 mm. Calculate the percentage uncertainty in the measurement of the diameter. (1) Percent
June 2019, AS Unit 3, Q1(c) (2 marks): The student took further measurements of the diameter and calculated a mean. Describe how the student should use this measuring device to make the measurements
June 2019, AS Unit 3, Q1(d)(i) (2 marks): Calculate the mean diameter of the second metal sphere. (2) Mean diameter of the second metal sphere =
June 2019, AS Unit 3, Q1(d)(ii) (2 marks): Calculate the percentage uncertainty in the mean diameter of the second metal sphere. (2) Percentage uncertainty in the mean diameter =
June 2019, AS Unit 3, Q1(f) (2 marks): The student calculated the density of the second metal sphere to be 7.75 × 103 kg m–3 with an uncertainty of 2%. Determine whether the two spheres could be made
June 2019, AS Unit 3, Q3(a) (4 marks): Describe how the student can accurately determine the radius of the first bright ring of the diffraction pattern. (4)
June 2019, AS Unit 3, Q3(c)(i) (2 marks): Criticise these results. (2)
June 2019, AS Unit 3, Q3(c)(ii) (6 marks): Use the results in the table to plot a graph of λ on the y-axis against sin θ on the x-axis on the grid provided. Use the right-hand column of the table for you
June 2019, AS Unit 3, Q3(c)(iii) (3 marks): Determine the gradient of the graph. (3) Gradient =
June 2019, AS Unit 3, Q4(b)(i) (2 marks): Identify two significant sources of uncertainty in the student’s measurements. (2)
June 2019, AS Unit 3, Q4(b)(ii) (4 marks): For each of these sources of uncertainty, describe an experimental technique the student could have used to obtain an accurate measurement. (4)

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