plumiPotential difference, resistance and Ohm’s law: Edexcel International A Level Physics questions
Edexcel International A Level Physics past-paper questions on 2.4.1.2 Potential difference, resistance and Ohm’s law, 2019–2025, with mark schemes and examiner’s reports where available.
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All 18 questions on Potential difference, resistance and Ohm’s law, as a list
- June 2025, AS Unit 2, Q3 (1 mark): Which of the following units is equivalent to the coulomb? A A s –1 B J V –1 C W A –1 D W V –1
- June 2025, AS Unit 2, Q8 (1 mark): The cell in a solar-powered lamp stores 6.0 kJ of energy. The lamp is switched on and the cell discharges fully. The cell has a constant e.m.f. of 1.5 V. Which
- June 2025, AS Unit 2, Q16(b)(i) (3 marks): Show that the reading on the ammeter is about 20 mA. (3)
- June 2025, AS Unit 2, Q16(b)(ii) (3 marks): Determine the resistance of resistor X. (3) Resistance of resistor X =
- October 2024, AS Unit 2, Q14(c) (2 marks): The student increased the p.d. across the LED from 0 V to 2.4 V. Describe, without further calculations, how the resistance of the LED changed. (2)
- October 2024, AS Unit 2, Q19(d) (3 marks): In the photomultiplier, the photocathode and several other metal plates are in a vacuum, as shown. metal plate photocathode vacuum 6 m s –1. An electron is emit
- October 2024, AS Unit 3, Q2(a)(iii) (4 marks): The student had a choice of resistors to use for the resistor R, as shown in the table. Resistor A B C D Resistance / Ω 18 18 33 33 Maximum power / W 0.5 2.0 0.
- January 2024, AS Unit 2, Q5 (1 mark): The diagram shows a 1.5 V cell in a circuit with two resistors. The cell has negligible internal resistance. 1.5 V 10 Ω 5 Ω V The switch is closed. What is the
- January 2024, AS Unit 2, Q12 (3 marks): A circuit contains a filament bulb. When the potential difference across the filament is 8.9 V, the resistance of the filament is 7.5 Ω. Calculate the time take
- October 2023, AS Unit 2, Q15(b)(i) (2 marks): Show that the work done on each electron is about 4 × 10 –16 J. (2)
- June 2023, AS Unit 2, Q11(b) (2 marks): In 60 seconds, the resistor transfers 24 J of energy. Calculate the potential difference across the resistor. (2) Potential difference =
- January 2023, AS Unit 2, Q9 (1 mark): A lamp is connected in the circuit as shown. The cell has negligible internal resistance. 1.5 V P In 30 seconds, the charge passing point P is 0.4 C. Which of t
- October 2022, AS Unit 2, Q10 (1 mark): Which of the following units is equivalent to the volt? A C s–1 B J s–1 C J C–1 D J s
- January 2022, AS Unit 2, Q1 (1 mark): Which of the following units is equivalent to the volt? A J s–1 B W s–1 C J C–1 D W C–1
- October 2021, AS Unit 2, Q5 (1 mark): The unit of resistance is the ohm. Which of the following is equivalent to the ohm? A J C−2 s B J C2 s−1 C J C−1 s−1 D J C s
- June 2021, AS Unit 2, Q11(a) (1 mark): State the purpose of the resistor in this circuit. (1)
- June 2021, AS Unit 2, Q12(c) (2 marks): The switch remains closed and 12 C of charge flows through the battery. Calculate the decrease in the chemical energy store of the battery. (2) Decrease in chem
- June 2019, AS Unit 2, Q9 (1 mark): The definitions for current and potential difference both include A charge. B resistance. C time. D work done.
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