Lesson 6.2.3

6.2.3 Uniform electric field Quiz: OCR Physics, Unit 5

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

In partnership with Revision Ninja

Lesson 6.2.3, Uniform electric field: 20 multiple choice questions for the OCR Physics (H156), Unit 5: Particles and medical physics, written with Revision Ninja.

Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.

Host this setFree Play

The 20 questions

  1. What equation gives the uniform electric field strength E between two parallel plates?

    • E = V Q
    • E = V / d
    • E = F / d
    • E = V d

  2. Which unit is equivalent to newton per coulomb for electric field strength?

    • W m^-1
    • J C^-1
    • V m^-1
    • V m

  3. What trajectory does a charged particle follow when entering a uniform electric field perpendicularly?

    • Circular
    • Parabolic
    • Linear
    • Helical

  4. What happens to the capacitance of a parallel plate capacitor if the plate area is doubled?

    • It stays constant
    • It quadruples
    • It halves
    • It doubles

  5. What physical quantity is represented by the symbol epsilon_0 in electrostatics?

    • Electric potential
    • Magnetic flux linkage
    • Permittivity of free space
    • Capacitance per unit length

  6. Which equation correctly links permittivity epsilon, relative permittivity epsilon_r, and permittivity of free space epsilon_0?

    • epsilon = epsilon_r epsilon_0
    • epsilon = epsilon_0 / epsilon_r
    • epsilon = epsilon_r / epsilon_0
    • epsilon = epsilon_r + epsilon_0

  7. What field line pattern describes the electric field between two large oppositely charged parallel plates?

    • Circular and uniform
    • Radial and uniform
    • Divergent and non-uniform
    • Parallel and uniform

  8. What equation calculates the electric force F experienced by a charge q in an electric field E?

    • F = E / q
    • F = E q^2
    • F = q / E
    • F = E q

  9. What is the electric field strength between plates separated by 0.02 metres with 100 volts potential difference?

    • 2 V m^-1
    • 200 V m^-1
    • 5000 V m^-1
    • 0.0002 V m^-1

  10. If the separation between two parallel plates with constant voltage is halved, what happens to E?

    • It quadruples
    • It halves
    • It doubles
    • It stays constant

  11. What is the acceleration a of a particle with mass m and charge q in field E?

    • a = E m / q
    • a = E q / m
    • a = m q / E
    • a = E / (m q)

  12. A parallel plate capacitor has area 0.01 m^2 and separation 0.001 m. Calculate capacitance in terms of epsilon_0.

    • 10 epsilon_0
    • 100 epsilon_0
    • 0.1 epsilon_0
    • 0.00001 epsilon_0

  13. A dielectric material with relative permittivity epsilon_r = 5 fills a capacitor. How does C change?

    • Increases by factor 25
    • Decreases by factor 5
    • Remains unchanged
    • Increases by factor 5

  14. In which direction does an electron accelerate when placed in a uniform vertical electric field pointing downwards?

    • Horizontally left
    • Vertically downwards
    • Vertically upwards
    • Horizontally right

  15. How much work is done moving a 2 coulomb charge across a potential difference of 12 volts?

    • 0.16 J
    • 14 J
    • 6 J
    • 24 J

  16. What happens to the horizontal velocity of a charged particle moving horizontally into a vertical electric field?

    • Increases exponentially
    • Increases uniformly
    • Remains constant
    • Decreases to zero

  17. An electron and proton enter the same uniform electric field at equal horizontal speeds. Which deflects more?

    • Neither deflects
    • Proton
    • Electron
    • Both deflect equally

  18. A particle traverses plates of length L at horizontal speed v. What is its time in the field?

    • t = L v
    • t = L / v
    • t = v / L
    • t = L / v^2

  19. A charge q with mass m enters field E horizontally for time t. What is its vertical velocity vy?

    • vy = E q / (m t)
    • vy = E q t / m
    • vy = E m t / q
    • vy = E q m / t

  20. Plate separation is doubled and a dielectric of relative permittivity 4 is inserted. Net change in capacitance?

    • Multiplied by 8
    • Unchanged
    • Multiplied by 2
    • Halved

All OCR Physics quizzes