plumiResistance: OCR A‑Level Physics A questions
Every OCR A-Level Physics A exam question on 4.2.3 Resistance, 2016–2025, with its mark scheme and examiner’s report.
Find questions1,877
Calculations
Q16(a)
The whole paper ↗![June 2024 Paper 2, question 16(a): Describe how the student should change the circuit. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h55602-jun24-16-a-qp.webp?v=3)
Q16(b)(i)
The whole paper ↗![June 2024 Paper 2, question 16(b)(i): The axes below show a plot of current against temperature. The first four points from the table have been plotted. Plot the remaining points. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h55602-jun24-16-bi-qp.webp?v=3)
Q16(b)(ii)
The whole paper ↗![June 2024 Paper 2, question 16(b)(ii): Draw a suitable line of best fit through the data points. [1] 5 4 3 Current / mA 2 1 0 30 40 50 60 70 80 90 Temperature / °C](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h55602-jun24-16-bii-qp.webp?v=3)
Q16(c)
The whole paper ↗
Q6(a)
The whole paper ↗![June 2023 AS Paper 2, question 6(a): State the name of component Z. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h15602-jun23-06-a-qp.webp?v=3)
Q7(c)(i)
The whole paper ↗![June 2022 AS Paper 2, question 7(c)(i): Complete Fig. 7.2 to show how the student should connect the circuit to determine the resistance. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h15602-jun22-07-ci-qp.webp?v=3)
Q7(c)(ii)
The whole paper ↗![June 2022 AS Paper 2, question 7(c)(ii): The current in the wire is 0.34 ± 0.02 A and the potential difference across the wire is 6.2 ± 0.2 V. Calculate the resistance R of the wire. R = Ω [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h15602-jun22-07-cii-qp.webp?v=3)
Q7(c)(iv)
The whole paper ↗![June 2022 AS Paper 2, question 7(c)(iv): Suggest why R from (c)(ii) is less than 31 Ω. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h15602-jun22-07-civ-qp.webp?v=3)
Q7(c)(v)
The whole paper ↗![June 2022 AS Paper 2, question 7(c)(v): Suggest two improvements to the student’s experiment to determine R experimentally. 1. 2. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h15602-jun22-07-cv-qp.webp?v=3)
Q18(a)(iv)
The whole paper ↗
Q2(b)
The whole paper ↗
Q23(c)(i)
The whole paper ↗![November 2021 AS Paper 1, question 23(c)(i): Explain why V decreases at the start. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h15601-nov21-23-ci-qp.webp?v=3)
Q5(c)(i)
The whole paper ↗![November 2021 AS Paper 2, question 5(c)(i): Use the graph to determine the resistance R of the variable resistor. R = Ω [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h15602-nov21-05-ci-qp.webp?v=3)
All 30 questions on Resistance, as a list
- June 2024, Paper 2, Q16(a) (1 mark): Describe how the student should change the circuit. [1]
- June 2024, Paper 2, Q16(b)(i) (1 mark): The axes below show a plot of current against temperature. The first four points from the table have been plotted. Plot the remaining points. [1]
- June 2024, Paper 2, Q16(b)(ii) (1 mark): Draw a suitable line of best fit through the data points. [1] 5 4 3 Current / mA 2 1 0 30 40 50 60 70 80 90 Temperature / °C
- June 2024, Paper 2, Q16(c) (3 marks): Describe, using the graph and calculations using data from the table, how the resistance of the thermistor varies for increasing temperature. Hence determine wh
- June 2024, AS Paper 1, Q23(a) (4 marks): A student makes measurements to plot the variation of resistance with temperature of the thermistor. They submerge the thermistor into distilled water at 50 °C.
- June 2023, AS Paper 1, Q18 (1 mark): A tungsten filament lamp is connected in a circuit as shown. V The variable resistor is adjusted so that the temperature of the filament lamp increases. What ha
- June 2023, AS Paper 2, Q6(a) (1 mark): State the name of component Z. [1]
- June 2022, Paper 2, Q14 (1 mark): A wire in a circuit obeys Ohm’s law. Which statement about the wire is linked to this law? A The current in the wire is directly proportional to the potential d
- June 2022, AS Paper 1, Q14 (1 mark): Which graph best represents the way in which the resistance R of a negative temperature coefficient (NTC) thermistor depends on its temperature θ in °C? R R R R
- June 2022, AS Paper 1, Q16 (1 mark): The I-V characteristics of two components R and L are shown below. R 40 L I / mA 20 0 0 1.0 2.0 V / V Which statement is correct? A R and L are both filament la
- June 2022, AS Paper 2, Q7(c)(i) (2 marks): Complete Fig. 7.2 to show how the student should connect the circuit to determine the resistance. [2]
- June 2022, AS Paper 2, Q7(c)(ii) (1 mark): The current in the wire is 0.34 ± 0.02 A and the potential difference across the wire is 6.2 ± 0.2 V. Calculate the resistance R of the wire. R = Ω [1]
- June 2022, AS Paper 2, Q7(c)(iv) (2 marks): Suggest why R from (c)(ii) is less than 31 Ω. [2]
- June 2022, AS Paper 2, Q7(c)(v) (2 marks): Suggest two improvements to the student’s experiment to determine R experimentally. 1. 2. [2]
- November 2021, Paper 2, Q5 (1 mark): A circuit with four light-emitting diodes (LEDs) P, Q, R and S is shown below. Q P R S Two LEDs are lit in this circuit. Which two LEDs are lit? A P and Q B P a
- November 2021, Paper 2, Q18(a)(iv) (2 marks): The current measured by the ammeter is smaller than that calculated in (ii). This is because the temperature of R increased due to heating by the current. Witho
- November 2021, Paper 3, Q2(b) (6 marks): The current in an LDR depends on the intensity of light incident on it. A student decides to alter the intensity of light incident on an LDR by using sheets of
- November 2021, AS Paper 1, Q23(c)(i) (2 marks): Explain why V decreases at the start. [2]
- November 2021, AS Paper 2, Q5(c)(i) (1 mark): Use the graph to determine the resistance R of the variable resistor. R = Ω [1]
- November 2020, Paper 2, Q18 (6 marks): 18* A resistance wire is coiled around a thermistor. The coil of wire will warm the thermistor. It is suggested that the relationship between the power P dissip
- November 2020, Paper 3, Q5(c) (1 mark): Suggest why the diode in Fig. 5.1 is necessary for an ammeter to detect a signal at the receiver aerial. [1]
- June 2019, Paper 2, Q19(a) (2 marks): Use Fig. 19.2 to show that the p.d. across the 50 Ω resistor is 0.50 V.
- June 2018, Paper 2, Q16(b)(i) (1 mark): Show that the resistance of R is 40 Ω.
- June 2018, AS Paper 1, Q13 (1 mark): The intensity of light incident on a light-dependent resistor (LDR) is increased. Its resistance decreases. Which statement gives the correct reason for this be
- June 2018, AS Paper 1, Q24(a)(ii) (3 marks): Analyse the data in the table and hence identify the component. [3]
- June 2018, AS Paper 2, Q6(a) (1 mark): Suggest the two components X and Y that were used. Name of component X Name of component Y [1]
- June 2017, AS Paper 1, Q24(a)(ii) (3 marks): The thermistor is now heated using a naked flame. Describe and explain the effect on the ammeter and voltmeter readings. [3]
- June 2017, AS Paper 2, Q4(a)(iii) (2 marks): State and explain whether the heater obeys Ohm’s law. [2]
- June 2016, AS Paper 1, Q27(a) (4 marks): Describe and justify the variation of resistance R of the LED as the potential difference V across the LED is increased from • –1.0 V to 2.6 V • 2.6 V to 3.0 V
- June 2016, AS Paper 1, Q27(b) (3 marks): A student uses the LED with the characteristic shown in Fig. 27.1 to construct the circuit shown in Fig. 27.2. 1.5 V S R Fig. 27.2 A suitable resistor R is used
Questions, mark schemes and examiner’s reports are © OCR, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? Every OCR A-Level Physics A paper, or our free OCR-style practice pack.
Rather write your answers by hand on iPad? Plumi marks them against the same mark schemes.