plumiCapacitance and energy stored: Edexcel International A Level Physics questions
Edexcel International A Level Physics past-paper questions on 4.4.2.1 Capacitance and energy stored, 2019–2025, with mark schemes and examiner’s reports where available.
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All 28 questions on Capacitance and energy stored, as a list
- June 2025, Unit 4, Q2 (1 mark): A capacitor is charging. A graph of potential difference against charge is shown. Potential difference 0 0 Charge Which of the following gives the capacitance o
- June 2025, Unit 4, Q17(b)(ii) (3 marks): Calculate the change in the energy stored in the capacitor during the discharging process. (3) Change in the energy stored =
- June 2025, Unit 6, Q1(a)(ii) (2 marks): The student moved the switch to position A to charge the 680 µF electrolytic capacitor. She moved the switch to position B to connect the capacitor to another c
- January 2025, Unit 4, Q10 (1 mark): A charged capacitor C1 stores energy W1. A charged capacitor C2 stores energy W2. C1 has half the capacitance of C2. C1 is charged to half the potential differe
- January 2025, Unit 4, Q20(d) (2 marks): The student connected a second identical capacitor in series with the first capacitor. She connected the switch to position X to charge both capacitors. Explain
- June 2024, Unit 4, Q12(b)(ii) (3 marks): Calculate the charge on the capacitor when it is fully charged. (3) Charge =
- June 2024, Unit 4, Q12(b)(iii) (2 marks): Calculate the energy stored by the capacitor when it is fully charged. (2) Energy =
- June 2024, Unit 6, Q1(c)(iii) (3 marks): Determine the efficiency of the electric motor. maximum potential difference across capacitor = 6 V capacitance of capacitor = 4700 μF m = 20 g (3) Efficiency =
- January 2024, Unit 4, Q7 (1 mark): A potential difference V is connected across a capacitor of capacitance C. The charge stored on the capacitor is Q. V C The capacitor is replaced with two capac
- January 2024, Unit 4, Q11 (3 marks): A student selects the capacitor shown to use in a circuit. (Source: © David J. Green – electrical/Alamy Stock Photo) The tolerance of the capacitor is ± 20%. Ca
- October 2023, Unit 4, Q18(b) (3 marks): An ultracapacitor is a high-capacity capacitor. One ultracapacitor has a capacitance of 47 F. The maximum charge this capacitor can store is 56 C. It is suggest
- October 2023, Unit 4, Q20(a) (5 marks): There is an electrostatic force on the sphere when the sphere is charged. The capacitance C of the sphere is given by C = 4πε0r where r is the radius of the con
- June 2023, Unit 4, Q2 (1 mark): There is a potential difference of 6 V across a 220 μF capacitor. Which of the following expressions gives the charge stored on the capacitor? A 0.5 × 2.2 × 10
- January 2023, Unit 4, Q16(b)(ii) (4 marks): Determine the average current in the circuit between t = 0 s and t = 30 s. (4) Average current =
- January 2023, Unit 4, Q16(b)(iii) (3 marks): Calculate the energy dissipated by the current in the circuit between t = 0 s and t = 30 s. (3) Energy dissipated =
- October 2022, Unit 4, Q5 (1 mark): The graph shows how the charge Q stored on the plates of a capacitor varies with the potential difference V across the plates. Q / nC 550 0 12 V / V Which of th
- June 2022, Unit 4, Q3 (1 mark): When the potential difference across a capacitor is V, the energy stored by the capacitor is W. Which of the following gives the energy stored by the capacitor
- June 2022, Unit 4, Q9 (1 mark): Which of the following units is equivalent to the farad? A C V −1 B J V −1 C Ω s −1 D s J −1
- January 2022, Unit 4, Q14(e) (2 marks): Determine the maximum energy stored by the capacitor. (2) Maximum energy =
- October 2021, Unit 4, Q7 (1 mark): A battery of e.m.f. V is connected to a capacitor as shown. The capacitor is initially uncharged. V Work is done by the battery to transfer a charge Q from one
- June 2021, Unit 4, Q17(b)(iv) (2 marks): Calculate the charge on the fully charged capacitor. (2) Charge =
- June 2021, Unit 4, Q17(b)(v) (2 marks): Calculate the energy stored by the fully charged capacitor. (2) Energy stored =
- January 2021, Unit 4, Q11(a) (2 marks): Calculate the total charge stored by the capacitors. (2) Total charge stored =
- January 2021, Unit 4, Q11(b) (2 marks): Calculate the total energy stored by the capacitors. (2) Total energy stored =
- October 2020, Unit 4, Q3 (1 mark): A potential difference (p.d.) V is connected across a capacitor of capacitance C. The charge stored on the capacitor is Q. V C The capacitor is replaced with tw
- October 2020, Unit 4, Q4 (1 mark): The SI unit of capacitance is the farad. Which of the following gives the base units of the farad? A C V–1 B C2 J–1 C kg–1 m–2 A2 s4 D kg–1 m–2 s–2 C–2
- October 2020, Unit 4, Q15(c) (5 marks): The student tested the capacitor by charging it until the p.d. across the capacitor was 600 V and recording the p.d. as it was discharged through a resistor of
- January 2020, Unit 4, Q17(c) (3 marks): The student states: “A capacitor is being used in this circuit. The function of the capacitor is to store electric charge.” Explain why this is not a complete d
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