plumiResistance: Eduqas A‑Level Physics questions
Every Eduqas A-Level Physics exam question on 2.2 Resistance, 2016–2025, with its mark scheme and examiner’s report.
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Calculations
Q2(a)
The whole paper ↗![June 2025 Component 2, question 2(a): Sketch a circuit diagram of the apparatus David could use to obtain a range of readings of I and V. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/a420u20-jun25-02-a-qp.webp)
Q2(b)
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Q2(c)(i)
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Q2(c)(ii)
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Q3(a)
The whole paper ↗![June 2025 Component 2, question 3(a): Show that the unit of resistance, Ω, can be expressed in the following two ways. [3] V A–1 J s C–2](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/a420u20-jun25-03-a-qp.webp)
Q3(c)
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Q3(c)(i)
The whole paper ↗![June 2025 AS Component 1, question 3(c)(i): Calculate the electrical energy transferred by the motor between A and B. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/b420u10-jun25-03-ci-qp.webp)
Q3(a)
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Q3(c)(i)
The whole paper ↗![June 2025 AS Component 2, question 3(c)(i): State what is meant by superconductivity. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/b420u20-jun25-03-ci-qp.webp)
Q3(c)(ii)
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Q5(a)
The whole paper ↗![June 2025 AS Component 2, question 5(a): ‘The pd measured between two points in an electrical circuit is 1.6 V.’ Explain what is meant by this statement. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/b420u20-jun25-05-a-qp.webp)
Q6(a)(i)
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Q6(a)(ii)
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Q6(b)
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Q1(a)
The whole paper ↗![June 2024 Component 2, question 1(a): State ‘Ohm’s law’. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/a420u20-jun24-01-a-qp.webp)
Q1(b)(i)
The whole paper ↗![June 2024 Component 2, question 1(b)(i): Tom states the following: “Ohm’s law does apply between 0 V and 0.5 V, but not for the full range given.” Explain how the graph confirms the statement. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/a420u20-jun24-01-bi-qp.webp)
Q1(b)(ii)
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Q1(d)(i)
The whole paper ↗![June 2024 Component 2, question 1(d)(i): What is superconductivity? [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/a420u20-jun24-01-di-qp.webp)
Q1(d)(ii)
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Q3(a)(i)
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All 88 questions on Resistance, as a list
- June 2025, Component 2, Q2(a) (1 mark): Sketch a circuit diagram of the apparatus David could use to obtain a range of readings of I and V. [1]
- June 2025, Component 2, Q2(b) (1 mark): The relationship between I and V can be expressed as: I = kV n where k and n are unknown constants. By taking logs of both sides of the equation, complete the f
- June 2025, Component 2, Q2(c)(i) (6 marks): Determine values for k and n and hence write down an equation showing the relationship between I and V for this filament lamp. Analysis of uncertainties is not
- June 2025, Component 2, Q2(c)(ii) (2 marks): David’s teacher comments: “Your readings do not justify a high degree of confidence in the values for n and k.” State why the teacher is correct and what David
- June 2025, Component 2, Q3(a) (3 marks): Show that the unit of resistance, Ω, can be expressed in the following two ways. [3] V A–1 J s C–2
- June 2025, Component 2, Q3(c) (3 marks): Eleanor decides to construct the resistor, R, by winding a length, l, of nichrome wire around an insulator. The nichrome wire available to Eleanor has the follo
- June 2025, AS Component 1, Q3(c)(i) (2 marks): Calculate the electrical energy transferred by the motor between A and B. [2]
- June 2025, AS Component 2, Q3(a) (6 marks): Ada investigates the variation of resistance with temperature over the range 0 ºC to 100 ºC for a copper wire. Describe the apparatus and how Ada would use it t
- June 2025, AS Component 2, Q3(c)(i) (1 mark): State what is meant by superconductivity. [1]
- June 2025, AS Component 2, Q3(c)(ii) (3 marks): State one example of an application of a superconductor. Give an advantage and a disadvantage of using a superconductor instead of a conventional conductor, suc
- June 2025, AS Component 2, Q5(a) (2 marks): ‘The pd measured between two points in an electrical circuit is 1.6 V.’ Explain what is meant by this statement. [2]
- June 2025, AS Component 2, Q6(a)(i) (3 marks): Using digital calipers, the technician measures the diameter of the wire to be 1.23 mm. The resolution of the calipers is ± 0.01 mm. Calculate the cross-section
- June 2025, AS Component 2, Q6(a)(ii) (6 marks): The technician believes that the wire could be made of copper based on the following data. • The resistance across the ends of the wire is 0.038 Ω ± 5%. • The l
- June 2025, AS Component 2, Q6(b) (2 marks): A mobile phone company used to change the type of connector for use on its charging cables every five years. Following new regulations, all mobile phone compani
- June 2024, Component 2, Q1(a) (2 marks): State ‘Ohm’s law’. [2]
- June 2024, Component 2, Q1(b)(i) (2 marks): Tom states the following: “Ohm’s law does apply between 0 V and 0.5 V, but not for the full range given.” Explain how the graph confirms the statement. [2]
- June 2024, Component 2, Q1(b)(ii) (5 marks): Show by calculation, that the resistance of the lamp is different when the pd across it is 2.5 V and when it is 5.0 V, and explain, in terms of particles, why t
- June 2024, Component 2, Q1(d)(i) (1 mark): What is superconductivity? [1]
- June 2024, Component 2, Q1(d)(ii) (3 marks): A material becomes superconducting when it is placed in liquid helium. Sketch a graph of resistance against temperature for this material, labelling any key fea
- June 2024, Component 2, Q3(a)(i) (2 marks): Emma draws lines of maximum and minimum gradients. She also draws an estimated line of best fit through the data points (dotted line) and notices that it does n
- June 2024, Component 2, Q3(a)(ii) (1 mark): The teacher also states that the systematic error need not affect the result for the resistivity. State why the teacher is correct. [1]
- June 2024, Component 2, Q3(b) (7 marks): Emma determines the cross-sectional area of the wire to be (4.8 ± 0.4) × 10–8 m2. Determine the resistivity of nichrome along with its absolute uncertainty, giv
- June 2024, AS Component 1, Q3(b)(iii) (2 marks): Billy’s scooter operates at 36 V and 6.0 A. Calculate the electrical energy used by the motor during the journey. [2]
- June 2024, AS Component 2, Q6(a) (2 marks): Beatrice used a voltmeter and an ammeter to determine the resistance. Draw a diagram of the circuit that she used to obtain her results. [2]
- June 2024, AS Component 2, Q6(b) (4 marks): Beatrice’s results are given in the table. Length, l / m Resistance, R / Ω 0.100 1.2 0.200 2.5 0.300 3.7 0.400 5.0 0.500 6.2 0.600 7.4 Plot a graph with R on th
- June 2024, AS Component 2, Q6(c)(i) (6 marks): Determine the resistivity of the wire. [6]
- June 2024, AS Component 2, Q6(c)(ii) (2 marks): Beatrice’s value for the resistivity has a percentage uncertainty of ± 18%. A data source gives the value of the resistivity of nichrome as 110 × 10–8Ω m. Deter
- June 2023, Component 1, Q2(a) (4 marks): Zayn uses a 4.2 cm length of nichrome wire to create a heating coil. The wire has a diameter of 0.12 mm and a resistivity of 1.2 × 10–6 Ω m. Show that the rate
- June 2023, Component 2, Q1(a) (1 mark): Define the potential difference between two points in an electric circuit. [1]
- June 2023, Component 2, Q2(a) (1 mark): The size of a current in a wire, for a given pd, depends on its resistance. State, in terms of free electrons, how this resistance arises. [1]
- June 2023, Component 2, Q2(d) (2 marks): Many scientists from around the world are searching for a superconducting material which has a critical temperature above 273 K. Discuss the benefits to society
- June 2023, AS Component 2, Q5(c)(i) (3 marks): Alexander states that the drift velocity of the electrons in the piece of wire does not depend on the temperature of the wire. Evaluate whether this statement i
- June 2023, AS Component 2, Q5(c)(ii) (2 marks): He then states that the resistance of the aluminium wire does not depend on the temperature of the wire. Evaluate whether this statement is correct and state yo
- June 2023, AS Component 2, Q6(a)(iii) (2 marks): A technician claims that the power dissipated by resistor X is less than 0.1 W. Evaluate whether this statement is correct. [2]
- June 2023, AS Component 2, Q6(b) (4 marks): The constantan wire used to make the resistor, X, is 1.31 m long and 0.423 mm in diameter. Determine the resistivity of constantan and state its unit. [4]
- June 2023, AS Component 2, Q6(d) (2 marks): A metal becomes superconducting at a temperature of 3.7 K. Sketch a graph of resistance against temperature. [2]
- June 2022, AS Component 2, Q3(b)(i) (1 mark): Define the unit of potential difference, the volt. [1]
- June 2022, AS Component 2, Q3(b)(ii) (2 marks): Calculate the energy converted by the lamp in part (a) if the potential difference across it is 6.0 V. [2]
- June 2022, AS Component 2, Q3(c)(i) (2 marks): Louis, a Physics student, sets up a circuit to investigate how current varies with potential difference for an unknown electrical component. Complete the follow
- June 2022, AS Component 2, Q3(c)(ii) (6 marks): Louis obtains the following graphs for three different unknown components, A, B and C. Explain what the graphs tell us about the components. [6 QER] Component
- June 2022, AS Component 2, Q5(d) (1 mark): Explain why superconductors cannot be used as temperature sensors at very low temperatures. [1]
- Autumn 2021, Component 1, Q8(a) (2 marks): Paragraph 8 Read through the following article carefully. Build Your Own Strainmeter in an A-level Physics Classroom The first questions that need answering are
- Autumn 2021, Component 1, Q8(c) (2 marks): Paragraph 8 Read through the following article carefully. Build Your Own Strainmeter in an A-level Physics Classroom The first questions that need answering are
- Autumn 2021, Component 1, Q8(h) (2 marks): Paragraph 8 Read through the following article carefully. Build Your Own Strainmeter in an A-level Physics Classroom The first questions that need answering are
- Autumn 2021, Component 2, Q3(a)(i) (1 mark): Tom does not plot error bars for temperature. Discuss why this is a reasonable decision to make. [1]
- Autumn 2021, Component 2, Q3(a)(ii) (2 marks): At 30 °C and 60 °C the following readings for R are obtained. Resistance / Ω Temperature / °C During heating During cooling 30 5.1 5.5 60 5.9 5.9 Use this infor
- Autumn 2021, Component 2, Q3(a)(iii) (3 marks): Draw lines of maximum and minimum gradients and determine the gradients of both lines. [3]
- Autumn 2021, Component 2, Q3(a)(iv) (2 marks): Hence calculate the mean gradient and the percentage uncertainty in its value. [2]
- Autumn 2021, Component 2, Q3(b)(i) (2 marks): Tom believes incorrectly that the answer to part (a)(iv) represents the temperature coefficient of resistance, α, for copper. Explain why Tom is incorrect. [2]
- Autumn 2021, Component 2, Q3(b)(ii) (5 marks): Determine α for copper, along with its absolute uncertainty. [5]
- Autumn 2021, Component 2, Q3(c) (2 marks): Tom notes that some of the error bars on his graph are large. Give a possible reason for this and suggest what practical steps Tom could have taken to reduce th
- Autumn 2020, Component 2, Q3(a) (6 marks): Sally writes a plan for an experiment to determine the resistivity, ρ, of nichrome in a wire. Her outline plan, which includes a diagram of the apparatus is giv
- Autumn 2020, Component 2, Q3(b) (4 marks): A heating unit proposed for the rear window of a car is to consist of four rectangular strips of resistive material, each of length 1.2 m and width 2.0 mm, join
- June 2019, Component 2, Q2(a) (1 mark): Jasmine obtains a range of values for V and I. Describe briefly how she does this. [1]
- June 2019, Component 2, Q2(b) (2 marks): The relationship between R and V can be expressed as: R = kV n where k and n are unknown constants. By taking logs of both sides of the equation, show how it ca
- June 2019, Component 2, Q2(c) (3 marks): Jasmine records the following data. Complete the table using an appropriate number of significant figures. [3] V / V I / A R / Ω log(V / V) log(R / Ω) 1.00 0.52
- June 2019, Component 2, Q2(d) (5 marks): Draw a graph of log R (vertical axis) against log V (horizontal axis) and draw a line of best fit. Error bars are not required. [5]
- June 2019, Component 2, Q2(e)(i) (4 marks): Use your graph to determine suitable values for k and n. [4]
- June 2019, Component 2, Q2(e)(ii) (1 mark): Hence, write down an equation showing the relationship between R and V for this filament lamp. [1]
- June 2019, Component 2, Q2(f) (1 mark): Comment on the quality of Jasmine’s results. [1]
- June 2019, Component 2, Q4(a) (6 marks): Describe how the resistance of a metal varies between 0 K and 1 000 K. [Assume that the metal is superconducting below a certain temperature.] Account for this
- June 2019, Component 2, Q4(b) (3 marks): Superconductors are used in MRI scanners and particle accelerators. Consider which of these two applications has been of greater benefit to society. [3]
- June 2019, AS Component 2, Q4(a)(i) (3 marks): Calculate the resistivity of the material of the wire. [3]
- June 2019, AS Component 2, Q4(a)(ii) (4 marks): Calculate the absolute uncertainty in the resistivity. [4]
- June 2019, AS Component 2, Q4(a)(iii) (2 marks): Evaluate whether it is possible to identify the unknown material from the table below. [2] Material Resistivity (10–8 m) Aluminium 2.65 Copper 1.68 Silver 1.59
- June 2019, AS Component 2, Q4(b)(i) (4 marks): Explain in terms of electrons why the current is smaller at 50 °C than at 0 °C. [4]
- June 2019, AS Component 2, Q4(b)(ii) (3 marks): Anika states that the resistance of the wire can be considered to be directly proportional to temperature in °C. Use the following table of data to determine wh
- June 2018, Component 1, Q9(e) (2 marks): Explain briefly how the author can derive Equation 9 from Equation 8. [2]
- June 2018, Component 1, Q9(f) (2 marks): Copper has a resistivity of 1.68 × 10–8 Ω m and has 8.5 × 1028 free electrons per m3. Use equation 9 to calculate the mean time between collisions for copper. [
- June 2018, Component 1, Q9(g) (4 marks): Explain why resistivity should be proportional to the square root of temperature (see paragraph 8 and Equation 9). [4]
- June 2018, Component 1, Q9(h) (2 marks): State and explain what charge you would expect a lattice vibration to carry (see paragraph 9). [2]
- June 2018, Component 2, Q1(a)(i) (2 marks): Explain how the current in the LDR changes as the light intensity decreases. [2]
- June 2018, Component 2, Q2(a)(ii) (2 marks): Show that the unit of resistance, the ohm (Ω), can be expressed as: [2] J s C–2
- June 2018, Component 3, Q10(c) (2 marks): The resistivity of silver is 1.59 × 10–8Ω m, the radius of the silver ring is 2.5 cm and the cross-sectional area of the silver wire of the ring is 2.4 × 10–5 m
- June 2018, AS Component 1, Q3(c)(i) (2 marks): If the bike’s electric motor operates at 36 V and 7.0 A calculate the electrical energy used by the motor between A and B. [2]
- June 2018, AS Component 2, Q2(a) (2 marks): In the circuit shown, the potential difference between X and Y is 6.0 V. Explain what this statement means. [2]
- June 2017, Component 2, Q1(a) (1 mark): Define the potential difference across two points in an electric circuit. [1]
- June 2017, Component 2, Q1(d) (2 marks): The arrangement can also be used as a basis for a thermometer. By considering the shape of the graph on page 3 discuss whether this thermistor arrangement would
- June 2017, Component 2, Q2(b) (2 marks): The alloy nichrome is commonly used to make ‘Metal Film Resistors’. A cross-section through such a resistor is shown. The value of the resistor is determined by
- June 2017, Component 2, Q2(c)(iii) (3 marks): Wire Y is replaced with another wire Z of the same cross-sectional area as Y but double the length and made of a material with resistivity half that of X. Calcu
- June 2017, Component 3, Q4(b) (3 marks): Show that a steady current of approximately 25 mA is carried in the wire when a pd of 12.0 V is applied across its ends. The resistivity of the wire is 1.59 × 1
- June 2017, AS Component 2, Q4(c)(i) (1 mark): State what is meant by a superconductor. [1]
- June 2017, AS Component 2, Q4(c)(ii) (4 marks): State and explain one advantage and one disadvantage of using superconductors to carry large currents. [4] Advantage: Disadvantage:
- June 2016, AS Component 1, Q4(d) (3 marks): James’s friend Annabel wanted to determine the metal of a wire and instead of obtaining its density; she obtained its resistivity using the following data. leng
- June 2016, AS Component 2, Q1(a) (2 marks): State Ohm’s law. [2]
- June 2016, AS Component 2, Q1(b)(i) (3 marks): A metal wire has length 85.0 cm and diameter 0.40 mm. A potential difference of 9.0 V applied across the ends of the wire produced a current of 1.20 A. Calculat
- June 2016, AS Component 2, Q1(b)(ii) (3 marks): George repeats the experiment with another wire made of the same metal but half the length and half the original diameter. George measures a current of 0.55 A w
- June 2016, AS Component 2, Q3(a) (1 mark): Explain how the graph shows that the thermistor is not a metal. [1]
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