Energy and voltage in circuits: Edexcel International GCSE Physics questions

Every Edexcel International GCSE Physics exam question on Energy and voltage in circuits (specification points 2.7–2.21), 2019–2025, with its mark scheme and examiner’s report.

All 183 questions on Energy and voltage in circuits, as a list

June 2025, Paper 1, Q3(a)(i) (2 marks): Explain why the reading on the voltmeter is 2.1 V. (2)
June 2025, Paper 1, Q3(a)(ii) (3 marks): The resistor in the circuit has a resistance of 290 Ω. Calculate the current in the resistor. Use the formula voltage = current × resistance (3) current = A
June 2025, Paper 1, Q3(a)(iii) (1 mark): State the reading on the ammeter. (1) ammeter reading = A
June 2025, Paper 1, Q3(a)(iv) (3 marks): Calculate the resistance of the thermistor. (3) resistance = Ω
June 2025, Paper 1, Q3(b)(i) (3 marks): Explain this observation. (3)
June 2025, Paper 1, Q3(b)(ii) (3 marks): The student wants to use the circuit as a temperature‑measuring device. They have this additional equipment • a large beaker • water at different temperatures •
June 2025, Paper 1, Q11(a)(i) (1 mark): State what is meant by the term voltage. (1)
June 2025, Paper 1, Q11(a)(ii) (3 marks): The large voltage causes electrons to accelerate from the negative electrode towards the positive electrode. An electron gains 1.0 × 10–16 J of energy when it a
June 2025, Paper 2, Q3(d) (3 marks): The solar panel can charge the battery in the camper van with a maximum current of 15 A. Calculate the minimum time to transfer 360 000 C of charge through the
June 2025 (R), Paper 1, Q3(a) (3 marks): The table shows the circuit symbols for some electrical components. Complete the table by placing ticks () to show whether each component can visibly indicate
June 2025 (R), Paper 1, Q3(b)(i) (1 mark): Give the name of component X. (1)
June 2025 (R), Paper 1, Q3(b)(ii) (1 mark): Using the graph, determine the resistance of component X when its temperature is 50 °C. (1) resistance = Ω
June 2025 (R), Paper 1, Q3(b)(iii) (3 marks): The cell in diagram 1 has a voltage of 9.0 V. Calculate the current in component X when its temperature is 50 °C. Use the formula voltage = current × resistance
June 2025 (R), Paper 1, Q3(b)(iv) (4 marks): The circuit in diagram 1 is modified by adding a second identical component X in series with the other components. The temperatures of the first component X and
November 2024, Paper 1, Q9(a) (4 marks): The student first investigates how the voltage of a diode affects the current in the diode. They use this equipment. • diode • cell • variable resistor • wires
November 2024, Paper 1, Q9(b)(i) (1 mark): Calculate the current in the battery. (1) current = A
November 2024, Paper 1, Q9(b)(ii) (1 mark): State the formula linking voltage, current and resistance. (1)
November 2024, Paper 1, Q9(b)(iii) (2 marks): Calculate the resistance of resistor A. (2) resistance = Ω
November 2024, Paper 1, Q9(b)(iv) (4 marks): Diagram 2 shows the same three components connected in a different circuit. 2.9 V A B Diagram 2 Resistor B has a resistance of 13 ohms. Comment on the differenc
November 2024, Paper 2, Q2(b)(ii) (1 mark): State the formula linking charge transferred, current and time. (1)
November 2024, Paper 2, Q2(b)(iii) (3 marks): The mean current displayed on the ammeter is 6.8 × 10–6 A. The current lasts for 3.7 ms. Calculate the charge transferred. (3) charge = C
June 2024, Paper 1, Q7(a) (2 marks): Explain an advantage of using this circuit for domestic lighting. (2)
June 2024, Paper 1, Q7(b)(i) (1 mark): Give the name of the charged particle that moves in an electric current. (1)
June 2024, Paper 1, Q7(c)(i) (1 mark): State what is meant by the term voltage. (1)
June 2024, Paper 1, Q7(c)(ii) (2 marks): Switches 1 and 3 are closed, which turn on lamps 1 and 3. Switch 2 is open. Calculate the current in the mains supply. (2) current = mA
June 2024, Paper 1, Q11(a) (2 marks): The power bank stores charge. The charge stored can be measured in amp-hours (Ah). 1 Ah is the amount of charge transferred by a current of 1 A in a time of 1 h
June 2024, Paper 1, Q11(b)(i) (3 marks): Calculate the time taken to recharge the electronic device. Give your answer in minutes. (3) time = minutes
June 2024, Paper 1, Q11(b)(ii) (2 marks): The electronic device is connected to the power bank using a long cable. Suggest how using a long cable affects the time taken to recharge the electronic device
June 2024, Paper 1, Q11(c) (4 marks): A student owns three electronic devices. Each electronic device stores a different amount of charge. The table gives some information about the charge stored by
June 2024 (R), Paper 1, Q7(a) (4 marks): The student is given this equipment to investigate component X. • battery • variable resistor • ammeter • voltmeter • connecting wires The diagram shows an inco
June 2024 (R), Paper 1, Q7(b)(i) (1 mark): Draw a line of best fit on the graph. (1)
June 2024 (R), Paper 1, Q7(b)(ii) (5 marks): Calculate the resistance of component X when the voltage is 4.2 V. Give the unit. (5) resistance = unit
June 2024 (R), Paper 1, Q7(b)(iii) (1 mark): Which of these is equivalent to 4.2 V? (1) A 4.2 coulombs per second (C / s) B 4.2 seconds per joule (s / J) C 4.2 joules per second (J / s) D 4.2 joules per co
June 2024 (R), Paper 1, Q7(b)(iv) (2 marks): The student concludes that component X is a filament lamp. Comment on the student’s conclusion. (2)
June 2024 (R), Paper 1, Q10(b)(i) (2 marks): Direct current (d.c.) is needed to charge the battery. Explain why there is a diode in the circuit. (2)
November 2023, Paper 1, Q4(a) (1 mark): Which of these is the correct circuit symbol for a filament lamp? (1) A B M C D
November 2023, Paper 1, Q10(a)(i) (1 mark): State the formula linking voltage, current and resistance. (1)
November 2023, Paper 1, Q10(a)(ii) (3 marks): Calculate the current in the resistor. (3) current = A
November 2023, Paper 1, Q10(b)(i) (1 mark): Complete the circuit diagram by adding a suitable meter to diagram 2 to measure the current in the 13 kΩ resistor. (1)
November 2023, Paper 1, Q10(b)(ii) (5 marks): The switch in the circuit is closed. Explain what happens to the current in the 13 kΩ resistor and the current in the battery. (5) 13 kΩ resistor battery
November 2023, Paper 2, Q7(c)(i) (1 mark): State the formula linking energy transferred, charge and voltage. (1)
November 2023, Paper 2, Q7(c)(ii) (3 marks): The effective voltage of the oscilloscope trace can be calculated using the formula effective voltage = amplitude of trace in V 2 Use the effective voltage to c
June 2023, Paper 1, Q2(a) (4 marks): Draw a circuit diagram the student could use in their investigation. (4)
June 2023, Paper 1, Q2(b)(i) (2 marks): Describe the relationship between current and voltage shown on the graph. (2)
June 2023, Paper 1, Q2(b)(ii) (1 mark): State the formula linking resistance, voltage and current. (1)
June 2023, Paper 1, Q2(b)(iii) (3 marks): Use the graph to determine the resistance of the filament lamp when the voltage across the lamp is 7.2 V. (3) resistance = Ω
June 2023, Paper 1, Q11(a) (4 marks): The voltage across the LED is 0.63 V. Calculate the current in the circuit. Give your answer in milliamps. (4) current = mA
June 2023, Paper 1, Q11(b) (4 marks): Diagram 2 shows a second LED and an extra resistor connected in parallel with the cell. 1.5 V A Diagram 2 The resistor and the LED are the same as the component
June 2023 (R), Paper 1, Q6(a) (4 marks): The student has access to this equipment • 12 V battery • ammeter and voltmeter 60 Ω resistor • • variable resistor • switch • connecting wires Draw a circuit d
June 2023 (R), Paper 1, Q6(b) (4 marks): Describe a suitable method the student could use for this investigation. (4)
June 2023 (R), Paper 1, Q6(c)(i) (3 marks): Complete the current–voltage graph by drawing a line that shows the expected results of the investigation. (3) 0.30 0.20 Current in A 0.10 0.00 0 2 4 6 8 10 12
June 2023 (R), Paper 1, Q6(c)(ii) (3 marks): The student repeats their investigation with a 120 Ω resistor. Explain how a current–voltage graph for a 120 Ω resistor compares with the current–voltage graph
June 2023 (R), Paper 2, Q3(b)(i) (3 marks): The sponge pad stores 5.0 mJ of energy in its electrostatic store. The voltage between the sponge pad and the metal post is 6000 V. Calculate the charge transfe
January 2023, Paper 1, Q7(a)(i) (1 mark): Give the name of component Y. (1)
January 2023, Paper 1, Q7(a)(ii) (1 mark): Give a reason why component Y is included in the circuit. (1)
January 2023, Paper 1, Q7(b)(i) (1 mark): State the formula linking charge, current and time. (1)
January 2023, Paper 1, Q7(b)(ii) (1 mark): Determine the current in the lamp when the voltage across the lamp is 10 V. (1) current = A
January 2023, Paper 1, Q7(b)(iii) (3 marks): Calculate the charge transferred through the lamp in 30 s when the voltage across the lamp is 10 V. Give the unit. (3) charge = unit
January 2023, Paper 1, Q7(b)(v) (2 marks): The student disconnects the cell and reconnects it with its terminals reversed. Complete the graph to show how the current in the lamp varies with voltage acros
January 2023, Paper 1, Q7(c) (2 marks): The student replaces the filament lamp with a light emitting diode (LED) and replaces the cell with an alternating current (a.c.) power supply, as shown in diag
January 2023 (R), Paper 1, Q4(a) (4 marks): Draw a circuit diagram that the student could use for this investigation. (4)
January 2023 (R), Paper 1, Q4(b)(i) (1 mark): Plot the results on the grid. (1)
January 2023 (R), Paper 1, Q4(b)(ii) (1 mark): Draw the curve of best fit. (1) 1.0 0.8 0.6 Current in A 0.4 0.2 0.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 Voltage in V
January 2023 (R), Paper 1, Q4(c)(i) (1 mark): Suggest how the student could improve their investigation to find out whether a straight line or curve is more appropriate. (1)
January 2023 (R), Paper 1, Q4(c)(ii) (2 marks): Explain why the student should not expect current to be proportional to voltage for this filament lamp. (2)
January 2023 (R), Paper 2, Q3(d)(i) (1 mark): State the formula linking charge, current and time. (1)
January 2023 (R), Paper 2, Q3(d)(ii) (2 marks): When the squares of material are pulled apart there is a small spark. There is a current of 4.3 × 10–6 A in the air for a time of 2.3 × 10–3 s. Calculate the ch
January 2023 (R), Paper 2, Q4(a)(i) (1 mark): State the formula linking voltage, current and resistance. (1)
January 2023 (R), Paper 2, Q4(a)(ii) (3 marks): Calculate the voltage across the 17 Ω resistor. (3) voltage = V
January 2023 (R), Paper 2, Q4(a)(iii) (1 mark): State the voltage across the 6.2 Ω resistor. (1) voltage = V
January 2023 (R), Paper 2, Q4(a)(iv) (2 marks): Calculate the current in the battery. (2) current = mA
January 2023 (R), Paper 2, Q4(b) (3 marks): Diagram 2 shows a second circuit built by the student using the same battery and resistors. 17 Ω 6.2 Ω Diagram 2 Explain how the current in the battery will cha
June 2022, Paper 1, Q7(a) (1 mark): State what is meant by the term electric current. (1)
June 2022, Paper 1, Q7(b)(i) (1 mark): Give a reason why an LED is included in the circuit. (1)
June 2022, Paper 1, Q7(b)(ii) (1 mark): Add another component to the circuit in diagram 1 to measure the current in the fuse. (1)
June 2022, Paper 1, Q7(c)(i) (1 mark): Calculate the current I1 . (1) I1 = A
June 2022, Paper 1, Q7(c)(ii) (1 mark): State the current I2 . (1) I2 = A
June 2022, Paper 1, Q7(c)(iii) (3 marks): Explain which lamp is the brightest. (3)
June 2022, Paper 2, Q3(b)(i) (1 mark): State the formula linking charge, current and time. (1)
June 2022, Paper 2, Q3(b)(ii) (3 marks): Calculate the time in minutes to transfer a charge of 10 500 C to the battery. (3) time = minutes
June 2022, Paper 2, Q3(b)(iii) (2 marks): Charger Y can also be used to charge the mobile phone battery. Diagram 2 shows the information label for charger Y. Input voltage = 230 V Output voltage = 5.0 V
June 2022 (R), Paper 1, Q3(a)(i) (1 mark): Add another component to the diagram to measure the voltage of component X. (1)
June 2022 (R), Paper 1, Q3(a)(ii) (1 mark): Give the name of component X. (1)
June 2022 (R), Paper 1, Q3(b)(i) (2 marks): Use the graph to determine the resistance of component X when the light intensity is 4.0 arbitrary units. (2) resistance = Ω
June 2022 (R), Paper 1, Q3(b)(ii) (3 marks): The current in the circuit is 0.0018 A. Calculate the voltage across component X at a light intensity of 4.0 arbitrary units. (3) voltage = V
June 2022 (R), Paper 1, Q3(b)(iii) (2 marks): Explain what happens to the brightness of the lamp when component X is covered with a dark sheet of paper. (2)
June 2022 (R), Paper 1, Q6(b)(ii) (3 marks): A student varies the resistance of the variable resistor. The table shows the power of the loudspeakers for different resistance values of the variable resistor
June 2022 (R), Paper 1, Q6(b)(iii) (2 marks): Draw a curve of best fit. (2)
June 2022 (R), Paper 1, Q6(c) (4 marks): Diagram 3 shows the loudspeakers connected in series to a cell. Diagram 4 shows the loudspeakers connected in parallel to the same cell. 1.5 V 1.5 V 0.30 A 1.2
June 2022 (R), Paper 1, Q10(b)(i) (3 marks): Calculate the mean current in the resistor. (3) mean current = A
June 2022 (R), Paper 1, Q10(b)(ii) (3 marks): The thermal energy store of the resistor increases by 2.3 × 10–6 J as energy is transferred to it electrically. Calculate the mean voltage across the resistor w
January 2022, Paper 1, Q7(a)(i) (2 marks): Calculate the voltage across the thermistor. (2) voltage = V
January 2022, Paper 1, Q7(a)(ii) (1 mark): State the formula linking voltage, current and resistance. (1)
January 2022, Paper 1, Q7(a)(iii) (3 marks): Calculate the resistance of the thermistor. (3) resistance = Ω
January 2022, Paper 1, Q7(b)(i) (2 marks): Describe the relationship between the temperature and the resistance of the thermistor. (2)
January 2022, Paper 1, Q7(b)(ii) (3 marks): Explain how the reading on the voltmeter changes when the temperature of the room decreases. (3)
January 2022, Paper 2, Q6(b)(v) (1 mark): Draw the circuit symbol for an a.c. power supply. (1)
January 2022 (R), Paper 1, Q9(a) (2 marks): A light emitting diode (LED) is represented using the symbol Draw a LED on the circuit diagram that will indicate when there is a current in resistor R1 . (2)
January 2022 (R), Paper 1, Q9(b)(i) (1 mark): Draw an ammeter on the circuit diagram that will measure the current in the cell. (1)
January 2022 (R), Paper 1, Q9(b)(ii) (2 marks): The voltage across the cell is 4.5 V. Explain how the voltage across R2 compares with the voltage across the cell. (2)
January 2022 (R), Paper 1, Q9(c)(i) (1 mark): State the formula linking energy transferred, charge and voltage. (1)
January 2022 (R), Paper 1, Q9(c)(ii) (3 marks): The voltage across the cell stays constant at 4.5 V. Calculate the charge transferred through the cell when the cell transfers 4.1 J of energy. (3) charge trans
January 2022 (R), Paper 1, Q9(c)(iii) (3 marks): A student investigates how the current in resistor R2 varies with the voltage across it. Describe how the circuit could be modified for the student to do this i
November 2021, Paper 1, Q2(a) (1 mark): State what is meant by the term electric current. (1)
November 2021, Paper 1, Q2(b) (1 mark): Give the name of the particles that flow if there is an electric current in a wire. (1)
November 2021, Paper 1, Q11(a)(i) (1 mark): Give the voltmeter reading. (1) voltage = V
November 2021, Paper 1, Q11(a)(ii) (1 mark): State the formula linking voltage, current and resistance. (1)
November 2021, Paper 1, Q11(a)(iii) (3 marks): Calculate the resistance of resistor X. (3) resistance = Ω
November 2021, Paper 1, Q11(b)(i) (1 mark): Give the reason why the reading on the ammeter would be 16 mA. (1)
November 2021, Paper 1, Q11(b)(ii) (4 marks): Calculate the resistance of resistor Y. (4) resistance = Ω
November 2021, Paper 1, Q11(c) (2 marks): Resistor X and the voltmeter are removed from the circuit, leaving a break in this part of the circuit. Explain how the current in the battery changes when thes
June 2021, Paper 1, Q5(a) (3 marks): Draw meters on the diagram to measure the voltage of the LED and the current in the LED. (3)
June 2021, Paper 1, Q5(b)(i) (3 marks): Plot the results on the grid. (3)
June 2021, Paper 1, Q5(b)(ii) (1 mark): One of the results is anomalous. On the graph, draw a circle around the anomalous result. (1)
June 2021, Paper 1, Q5(b)(iii) (1 mark): Draw a curve of best fit. (1)
June 2021, Paper 1, Q5(b)(iv) (1 mark): Give a reason why a line graph is the best way of showing these results. (1)
June 2021, Paper 1, Q5(b)(v) (1 mark): State the formula linking voltage, current and resistance. (1)
June 2021, Paper 1, Q5(b)(vi) (4 marks): Any current larger than 15 mA will permanently damage the LED. The resistor in the circuit has a resistance of 270 Ω. Use the results from the investigation to
June 2021, Paper 2, Q3(d) (3 marks): The plastic tube gains a charge of 4.3 mC. The energy stored on the tube is 3.7 J. Calculate the voltage between the plastic tube and the metal mast. (3) voltag
January 2021, Paper 1, Q3(a) (1 mark): Give a disadvantage of connecting the bulbs in series. (1)
January 2021, Paper 1, Q3(b) (1 mark): Suggest an advantage of connecting the bulbs in series. (1)
January 2021, Paper 1, Q3(c)(i) (1 mark): State the formula linking voltage, current and resistance. (1)
January 2021, Paper 1, Q3(c)(ii) (3 marks): Calculate the current in each bulb. (3) current = A
January 2021, Paper 1, Q3(d) (3 marks): Another decorative lamp, Y, uses five of the same 390 Ω bulbs connected in series. Both lamps are mains operated. Explain how the brightness of a single bulb in
January 2021 (R), Paper 1, Q12(a)(i) (4 marks): Draw the circuit diagram for this electrical circuit. The variable resistor has been drawn for you. (4)
January 2021 (R), Paper 1, Q12(a)(ii) (2 marks): Draw a voltmeter on the diagram to measure the voltage of the variable resistor. (2)
January 2021 (R), Paper 1, Q12(b) (4 marks): Explain how the voltage across the variable resistor changes if more mass is added to the end of the elastic string. (4)
January 2021 (R), Paper 1, Q12(c)(i) (1 mark): State the independent variable in the student’s investigation. (1)
January 2021 (R), Paper 1, Q12(c)(ii) (3 marks): Plot the student’s results on the grid. (3)
January 2021 (R), Paper 1, Q12(c)(iii) (1 mark): Draw a line of best fit. (1)
January 2021 (R), Paper 2, Q7(c)(ii) (3 marks): The total charge stored in bucket A is –1.1 × 10–10 C. This charge passes through the air between the buckets in 9.2 × 10–3 s, causing a spark between bucket A
January 2021 (R), Paper 2, Q7(c)(iii) (3 marks): The spark transfers a charge of –1.1 × 10–10 C. The mean voltage between the buckets is 1.7 kV. Calculate the energy transferred by the spark. (3) energy transf
November 2020, Paper 1, Q5(a) (4 marks): Complete the circuit diagram to show how the student should set up this equipment for her investigation. (4) component X
November 2020, Paper 1, Q5(b)(i) (3 marks): Plot a graph of the student’s results on the grid. Plot current on the y-axis and voltage on the x-axis. (3)
November 2020, Paper 1, Q5(b)(ii) (1 mark): Draw a curve of best fit. (1)
November 2020, Paper 1, Q5(b)(iii) (1 mark): State the name of component X. (1)
November 2020, Paper 1, Q6(a) (5 marks): When the thermistor is in hot water, its resistance is 490 Ω. Show that the resistance of the fixed resistor is about 400 Ω. (5)
November 2020, Paper 1, Q6(b) (3 marks): Explain how the voltage across the fixed resistor changes when the hot water is replaced with cold water. (3)
November 2020, Paper 2, Q2(c)(i) (1 mark): State the formula linking charge transferred, current and time taken. (1)
November 2020, Paper 2, Q2(c)(ii) (2 marks): Calculate the current if the metal ball takes 0.45 seconds to travel from plate Y to plate X. (2) current = A
November 2020, Paper 2, Q2(c)(iii) (1 mark): Suggest why the current increases if the voltage of the power supply is increased. (1)
November 2020, Paper 2, Q2(c)(iv) (1 mark): Give the name of the apparatus that can be used to measure current. (1)
November 2020 (R), Paper 1, Q5(a) (1 mark): Give a reason why the wires in the toaster are connected in parallel. (1)
November 2020 (R), Paper 1, Q5(b)(iii) (1 mark): The toaster contains 48 thin metal wires. Calculate the current in each of the thin metal wires. (1) current = A
November 2020 (R), Paper 1, Q9(a) (2 marks): Draw a voltmeter on the diagram to measure the voltage of the 4500 Ω resistor. (2)
November 2020 (R), Paper 1, Q9(b) (1 mark): Give the name of component X. (1)
November 2020 (R), Paper 1, Q9(c)(i) (1 mark): Calculate the voltage across the 4500 Ω resistor. (1) voltage = V
November 2020 (R), Paper 1, Q9(c)(ii) (2 marks): Calculate the current in the circuit. [voltage = current × resistance] (2) current = A
November 2020 (R), Paper 1, Q9(c)(iii) (3 marks): Calculate the resistance of component X. Give your answer in kΩ. (3) resistance = kΩ
November 2020 (R), Paper 1, Q9(d) (3 marks): Explain where a lamp should be connected in this circuit, so that the voltage across it increases as the light received by component X decreases. (3)
January 2020, Paper 1, Q3(a) (1 mark): Which quantity is defined as the rate of flow of charge? (1) A current B power C resistance D voltage
January 2020, Paper 1, Q3(b) (1 mark): Which quantity is defined as the energy transferred per unit charge passed? (1) A current B power C resistance D voltage
January 2020, Paper 1, Q3(c)(i) (2 marks): On Diagram 1, draw a voltmeter to measure the voltage of resistor S. (2)
January 2020, Paper 1, Q3(c)(ii) (2 marks): Deduce the readings on the ammeters. (2) current measured by A1 = A current measured by A2 = A
January 2020, Paper 1, Q3(c)(iii) (3 marks): Resistor R has a resistance of 11 Ω. Calculate the voltage across resistor R. (3) voltage = V
January 2020, Paper 1, Q3(c)(iv) (2 marks): Explain how the voltage across resistor R compares with the voltage across the battery. (2)
January 2020, Paper 1, Q3(d) (3 marks): Diagram 2 shows a different circuit containing a battery, an ammeter and a thermistor. A Diagram 2 Explain how the thermistor can be used to vary the current in
January 2020, Paper 2, Q4(b)(ii) (1 mark): State the formula linking charge, current and time. (1)
January 2020, Paper 2, Q4(b)(iii) (3 marks): It takes a time of 12 s from when the powder starts landing in the metal can until all the powder has landed in the can. Calculate the mean charging current. (3
January 2020 (R), Paper 1, Q6(a) (2 marks): Complete the diagram by adding an instrument to measure the voltage of the LDR. (2)
January 2020 (R), Paper 1, Q6(b)(i) (1 mark): State the formula linking voltage, current and resistance. (1)
January 2020 (R), Paper 1, Q6(b)(ii) (2 marks): The current in the circuit is 7.8 mA. Calculate the voltage across the 73 ohm resistor. (2) voltage across resistor = V
January 2020 (R), Paper 1, Q6(b)(iii) (2 marks): Calculate the voltage across the LDR. (2) voltage across LDR = V
January 2020 (R), Paper 1, Q6(c)(i) (2 marks): Describe the relationship between the resistance of the LDR and light intensity. (2)
January 2020 (R), Paper 1, Q6(c)(ii) (1 mark): The resistance of the LDR decreases. State the effect on the current in the circuit. (1)
January 2020 (R), Paper 1, Q6(c)(iii) (2 marks): Explain why the voltage across the LDR decreases when the resistance of the LDR decreases. (2)
January 2020 (R), Paper 1, Q7(a)(i) (1 mark): The unit of voltage is the volt. Which of these units is a volt? (1) A coulomb per second B joule per coulomb C joule per second D newton per coulomb
January 2020 (R), Paper 1, Q7(a)(ii) (1 mark): State the formula linking energy transferred, voltage and charge. (1)
January 2020 (R), Paper 1, Q7(a)(iii) (3 marks): Calculate the energy transferred to an electron when it passes through a voltage of 150 kV. [charge of electron = 1.6 × 10–19 C] (3) energy transferred = J
January 2020 (R), Paper 1, Q7(b)(i) (1 mark): State the formula linking charge, current and time. (1)
January 2020 (R), Paper 1, Q7(b)(ii) (3 marks): The charge on the generator discharges through the air as a spark. The charge takes a time of 0.68 ms to leave the generator. Calculate the mean (average) curre
June 2019, Paper 1, Q6(a)(i) (4 marks): A student investigates how current varies with voltage for a metal filament lamp. Draw a diagram of the circuit that a student could use for this investigation.
June 2019, Paper 1, Q6(a)(ii) (4 marks): Describe a method the student could use for their investigation. (4)
June 2019, Paper 1, Q6(b)(i) (1 mark): State the unit for current. (1)
June 2019, Paper 1, Q6(b)(ii) (2 marks): Calculate the missing value of energy for the voltage of 4.0 V. Give your answer to 2 significant figures. (2) ....J energy =...
June 2019, Paper 1, Q10(a) (4 marks): The diagram shows two resistors connected to a battery. 9.2V 12mA Y 2402 R Calculate the voltage across resistor R. (4) ....V voltage =...
June 2019 (R), Paper 1, Q5(a)(i) (2 marks): Use the diagram to determine the mean diameter of the cylinder of putty. (2) mean diameter = cm
June 2019 (R), Paper 1, Q5(a)(ii) (2 marks): Calculate the cross-sectional area of the cylinder of putty in cm2. [area of a circle = π × radius2] (2) cross-sectional area = cm2
June 2019 (R), Paper 1, Q5(b) (3 marks): The student connects a cylinder of putty to a battery. He measures the voltage of the cylinder and the current in the circuit. Complete the circuit diagram, add
June 2019 (R), Paper 1, Q5(c)(i) (2 marks): Calculate the resistance of the cylinder when the cross-sectional area of the cylinder is 24.6 cm2. Give your answer to 3 significant figures. (2) resistance =
June 2019 (R), Paper 1, Q5(c)(ii) (3 marks): Plot a graph of resistance on the y-axis and cross-sectional area on the x-axis. (3)
June 2019 (R), Paper 1, Q5(c)(iii) (1 mark): Draw the curve of best fit. (1)
June 2019 (R), Paper 1, Q5(d) (4 marks): The student extends his investigation by connecting two new identical cylinders to a battery. The diagram shows the circuit he uses. putty cylinder putty cylind

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