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Uniform electric field: OCR A‑Level Physics A questions

Every OCR A-Level Physics A exam question on 6.2.3 Uniform electric field, 2016–2025, with its mark scheme and examiner’s report.

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1,877 questions

  1. Q22(c)(i)

    June 2025 · Paper 2

    3 marks6.2.3 Uniform electric field
    The whole paper ↗
    June 2025 Paper 2, question 22(c)(i): Calculate the thickness, d, of the polythene in mm. d = mm [3]

  2. Q22(c)(ii)

    June 2025 · Paper 2

    3 marks6.2.3 Uniform electric field
    The whole paper ↗
    June 2025 Paper 2, question 22(c)(ii): Suggest how the experiment should be carried out in order to get a set of accurate and precise results. [3]

  3. Q1(a)(i)

    June 2025 · Paper 3

    3 marks6.2.3 Uniform electric field
    The whole paper ↗
    June 2025 Paper 3, question 1(a)(i): Calculate the kinetic energy gained by the electrons as they pass through the electric field, in joules. kinetic energy = J [3]

  4. Q22(a)(i)

    June 2024 · Paper 2

    2 marks6.2.3 Uniform electric field
    The whole paper ↗
    June 2024 Paper 2, question 22(a)(i): The diagram shows the plates of the model capacitor superimposed on the cloud. Draw on the diagram to show the electric field lines between capacitor plates. [2

  5. Q22(a)(ii)

    June 2024 · Paper 2

    1 mark6.2.3 Uniform electric field
    The whole paper ↗
    June 2024 Paper 2, question 22(a)(ii): Suggest why the actual electric field lines of the cloud would differ from what you have drawn. [1]

  6. Q22(a)(iii)

    June 2024 · Paper 2

    1 mark6.2.3 Uniform electric field
    The whole paper ↗
    June 2024 Paper 2, question 22(a)(iii): Show that the potential difference (p.d.) V between the plates is about 1 × 109 V. [1]

  7. Q22(a)(iv)

    June 2024 · Paper 2

    2 marks6.2.3 Uniform electric field
    The whole paper ↗
    June 2024 Paper 2, question 22(a)(iv): Calculate the capacitance C of the model capacitor. Assume the permittivity of the material of the cloud is the same as the permittivity of free space. C = F [2

  8. Q6(a)

    June 2024 · Paper 3

    1 mark6.2.3 Uniform electric field
    The whole paper ↗
    June 2024 Paper 3, question 6(a): Show that the magnitude of the constant electric force acting on the proton is about 10–19 N. [1]

  9. Q19(b)(i)

    June 2022 · Paper 2

    3 marks6.2.3 Uniform electric field
    The whole paper ↗
    June 2022 Paper 2, question 19(b)(i): Show that the magnitude of deceleration of this photoelectron is 8.8 × 1012 m s–2. [3]

  10. Q19(b)(ii)

    June 2022 · Paper 2

    2 marks6.2.3 Uniform electric field
    The whole paper ↗
    June 2022 Paper 2, question 19(b)(ii): Show that the initial speed of the photoelectron is about 3 × 105 m s–1. [2]

  11. Q19(b)(iii)

    June 2022 · Paper 2

    2 marks6.2.3 Uniform electric field
    The whole paper ↗
    June 2022 Paper 2, question 19(b)(iii): Calculate the time t taken by the photoelectron to travel from plate E to plate C. t = s [2]

  12. Q19(b)(iv)

    June 2022 · Paper 2

    2 marks6.2.3 Uniform electric field
    The whole paper ↗
    June 2022 Paper 2, question 19(b)(iv): Using the axes shown below, sketch a graph of kinetic energy Ek against distance x from plate E. 6.0 4.8 Ek / 10–20 J 4.0 2.0 0 0 3.0 6.0 x / mm [2]

  13. Q22(a)(i)

    June 2022 · Paper 2

    3 marks6.2.3 Uniform electric field6.1.2 Energy
    The whole paper ↗
    June 2022 Paper 2, question 22(a)(i): Determine the new: 1 capacitance in terms of C0 capacitance = C0 [1] 2 p.d. between the plates in terms of V0 p.d. = V0 [1] 3 energy stored in terms of E0. ener

  14. Q22(b)(ii)

    June 2022 · Paper 2

    5 marks6.1.3 Charging and discharging capacitors6.2.3 Uniform electric field
    The whole paper ↗
    June 2022 Paper 2, question 22(b)(ii): The data points plotted by the student are shown below. 0.12 T / s 0.10 0.08 0.06 10 12 14 16 18 20 R / MΩ 1 Draw a best-fit straight line through the data poin

  15. Q24(a)(i)

    November 2021 · Paper 2

    3 marks6.2.3 Uniform electric field
    The whole paper ↗
    November 2021 Paper 2, question 24(a)(i): Show that the vertical acceleration a of an electron between the plates is 8.8 × 1015 m s–2. [3]

  16. Q24(a)(ii)

    November 2021 · Paper 2

    1 mark6.2.3 Uniform electric field
    The whole paper ↗
    November 2021 Paper 2, question 24(a)(ii): The length of each plate is 0.12 m. Show that the time t taken by the electron to travel this length is 2.0 × 10–9 s. [1]

  17. Q24(a)(iii)

    November 2021 · Paper 2

    2 marks6.2.3 Uniform electric field
    The whole paper ↗
    November 2021 Paper 2, question 24(a)(iii): Calculate the vertical deflection x of the electron. x = m [2]

  18. Q24(b)

    November 2021 · Paper 2

    2 marks6.2.3 Uniform electric field
    The whole paper ↗
    November 2021 Paper 2, question 24(b): The arrangement shown in Fig. 24 is now used to investigate positrons emitted from a radioactive source. The speed of the positrons is also 6.0 × 107 m s–1. The

  19. Q1(a)(i)

    November 2020 · Paper 3

    2 marks6.2.3 Uniform electric field
    The whole paper ↗
    November 2020 Paper 3, question 1(a)(i): Show that the electric force acting on the charged ball is 4.5 × 10–4 N. [2]

  20. Q1(b)

    November 2020 · Paper 3

    4 marks6.2.3 Uniform electric field
    The whole paper ↗
    November 2020 Paper 3, question 1(b): The ball is still positively charged. The plates are now moved slowly towards each other whilst still connected to the 4.0 kV power supply. The plates are stopp
All 29 questions on Uniform electric field, as a list
  1. June 2025, Paper 2, Q22(c)(i) (3 marks): Calculate the thickness, d, of the polythene in mm. d = mm [3]
  2. June 2025, Paper 2, Q22(c)(ii) (3 marks): Suggest how the experiment should be carried out in order to get a set of accurate and precise results. [3]
  3. June 2025, Paper 3, Q1(a)(i) (3 marks): Calculate the kinetic energy gained by the electrons as they pass through the electric field, in joules. kinetic energy = J [3]
  4. June 2024, Paper 2, Q22(a)(i) (2 marks): The diagram shows the plates of the model capacitor superimposed on the cloud. Draw on the diagram to show the electric field lines between capacitor plates. [2
  5. June 2024, Paper 2, Q22(a)(ii) (1 mark): Suggest why the actual electric field lines of the cloud would differ from what you have drawn. [1]
  6. June 2024, Paper 2, Q22(a)(iii) (1 mark): Show that the potential difference (p.d.) V between the plates is about 1 × 109 V. [1]
  7. June 2024, Paper 2, Q22(a)(iv) (2 marks): Calculate the capacitance C of the model capacitor. Assume the permittivity of the material of the cloud is the same as the permittivity of free space. C = F [2
  8. June 2024, Paper 3, Q6(a) (1 mark): Show that the magnitude of the constant electric force acting on the proton is about 10–19 N. [1]
  9. June 2022, Paper 2, Q19(b)(i) (3 marks): Show that the magnitude of deceleration of this photoelectron is 8.8 × 1012 m s–2. [3]
  10. June 2022, Paper 2, Q19(b)(ii) (2 marks): Show that the initial speed of the photoelectron is about 3 × 105 m s–1. [2]
  11. June 2022, Paper 2, Q19(b)(iii) (2 marks): Calculate the time t taken by the photoelectron to travel from plate E to plate C. t = s [2]
  12. June 2022, Paper 2, Q19(b)(iv) (2 marks): Using the axes shown below, sketch a graph of kinetic energy Ek against distance x from plate E. 6.0 4.8 Ek / 10–20 J 4.0 2.0 0 0 3.0 6.0 x / mm [2]
  13. June 2022, Paper 2, Q22(a)(i) (3 marks): Determine the new: 1 capacitance in terms of C0 capacitance = C0 [1] 2 p.d. between the plates in terms of V0 p.d. = V0 [1] 3 energy stored in terms of E0. ener
  14. June 2022, Paper 2, Q22(b)(ii) (5 marks): The data points plotted by the student are shown below. 0.12 T / s 0.10 0.08 0.06 10 12 14 16 18 20 R / MΩ 1 Draw a best-fit straight line through the data poin
  15. November 2021, Paper 2, Q24(a)(i) (3 marks): Show that the vertical acceleration a of an electron between the plates is 8.8 × 1015 m s–2. [3]
  16. November 2021, Paper 2, Q24(a)(ii) (1 mark): The length of each plate is 0.12 m. Show that the time t taken by the electron to travel this length is 2.0 × 10–9 s. [1]
  17. November 2021, Paper 2, Q24(a)(iii) (2 marks): Calculate the vertical deflection x of the electron. x = m [2]
  18. November 2021, Paper 2, Q24(b) (2 marks): The arrangement shown in Fig. 24 is now used to investigate positrons emitted from a radioactive source. The speed of the positrons is also 6.0 × 107 m s–1. The
  19. November 2020, Paper 3, Q1(a)(i) (2 marks): Show that the electric force acting on the charged ball is 4.5 × 10–4 N. [2]
  20. November 2020, Paper 3, Q1(b) (4 marks): The ball is still positively charged. The plates are now moved slowly towards each other whilst still connected to the 4.0 kV power supply. The plates are stopp
  21. June 2019, Paper 2, Q22(a)(i) (2 marks): Use Fig. 22.2 to propose and carry out a test to show that Q is inversely proportional to d. Test proposed: Working: [2]
  22. June 2019, Paper 2, Q22(a)(ii) (2 marks): Use capacitor equations to show that Q is inversely proportional to d. [2]
  23. June 2019, Paper 2, Q22(b)(i) (1 mark): The power supply is adjusted so that the potential difference between the plates is 200 V when the oil drop becomes stationary. State the magnitude of the verti
  24. June 2019, Paper 2, Q22(b)(ii) (3 marks): The potential difference between the plates is now increased to 600 V. The oil drop accelerates upwards. Calculate the acceleration a of the oil drop. a = m s–2
  25. June 2019, Paper 2, Q22(c) (6 marks): (c)* Fig. 22.4 shows an arrangement used by a student to investigate the forces experienced by a small length of charged gold foil placed in a uniform electric
  26. June 2018, Paper 2, Q22(b) (6 marks): A student wishes to determine the permittivity ε of paper using a capacitor made in the laboratory. The capacitor consists of two large parallel aluminium plate
  27. June 2017, Paper 2, Q9 (1 mark): Two isolated parallel capacitor plates have an equal and opposite charge. The separation between the plates is doubled. The charge on each plate remains the sam
  28. June 2017, Paper 2, Q20(c)(ii) (3 marks): Fig. 20.2 shows the charged sphere from (i) suspended from a nylon thread and placed between two oppositely charged vertical plates. nylon 4.0° thread – + + Fig
  29. June 2017, Paper 2, Q21(a) (2 marks): A capacitor of capacitance 7.2 pF consists of two parallel metal plates separated by an insulator of thickness 1.2 mm. The area of overlap between the plates is

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