Lesson 7.2.1

7.2.1 Electric potential, field lines and equipotentials Quiz: Pearson Edexcel Physics, Unit 7

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

In partnership with Revision Ninja

Lesson 7.2.1, Electric potential, field lines and equipotentials: 20 multiple choice questions for the Pearson Edexcel Physics (9PH0), Unit 7: Electric and Magnetic Fields, 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. Electric potential at a point is defined relative to zero potential at where?

    • Infinity
    • Origin
    • Earth
    • Negative plate

  2. What is the SI unit of electric potential?

    • Ampere
    • Farad
    • Coulomb
    • Volt

  3. What is the electric potential at a distance r from a point charge Q in a vacuum?

    • V = 4 pi epsilon0 Q / r
    • V = Q / (4 pi epsilon0 r)
    • V = Q / (4 pi epsilon0 r^2)
    • V = Q r / (4 pi epsilon0)

  4. What is the angle between electric field lines and equipotential surfaces?

    • 90°
    • 45°
    • 0°
    • 180°

  5. The electric field is related to the potential gradient. Which equation expresses this relationship for a uniform field between parallel plates?

    • E = V / d
    • E = V^2 / d
    • E = V d
    • E = d / V

  6. What shape are equipotential surfaces surrounding an isolated point charge?

    • Concentric cylinders
    • Concentric circles
    • Parallel planes
    • Concentric spheres

  7. What is the electric potential at a point 0.20 m from a point charge of +4.0 nanocoulomb?

    • 720 V
    • -180 V
    • 45 V
    • 180 V

  8. A charge of 2.0 microcoulomb is moved through a potential difference of 50 V. What work is done?

    • 4.0 x 10^-5 J
    • 2.5 x 10^-8 J
    • 1.0 x 10^-4 J
    • 1.0 x 10^-2 J

  9. The potential difference between two parallel plates is 40 V and their separation is 0.050 m. What is the electric field strength between them?

    • 2000 V m^-1
    • 800 V m^-1
    • 0.00125 V m^-1
    • 8.0 V m^-1

  10. An electron is accelerated from rest through a potential difference of 100 V. What kinetic energy does it gain?

    • 1.6 x 10^-19 J
    • 1.6 x 10^-17 J
    • 1.0 x 10^2 J
    • 6.3 x 10^-19 J

  11. A proton is accelerated from rest through a potential difference of 2.0 kV. What is its kinetic energy?

    • 3.2 x 10^-16 J
    • 2.0 x 10^3 J
    • 1.6 x 10^-19 J
    • 1.3 x 10^16 J

  12. A potential falls by 6.0 V over a distance of 0.030 m in a uniform field. What is the field strength?

    • 600 V m^-1
    • 0.0050 V m^-1
    • 200 V m^-1
    • 18 V m^-1

  13. How much work is done moving a charge along an equipotential surface?

    • Zero
    • Infinite
    • ½ Q V
    • Q × V

  14. If the distance from a point charge is doubled, what happens to the electric potential?

    • It remains constant
    • It halves
    • It doubles
    • It quarters

  15. A +3.0 nC charge and a -3.0 nC charge are 0.60 m apart. What is the potential at the midpoint between them?

    • 180 V
    • -90 V
    • 90 V
    • Zero

  16. A point charge of +2.0 microcoulomb is fixed in place. What is the work done by an external agent in moving a charge of +1.0 microcoulomb from 0.40 m to 0.10 m from it?

    • 0.0045 J
    • 0.27 J
    • 1.35 J
    • 0.135 J

  17. A charge of +2.0 C moves from a point at 10 V to a point at 30 V. What is the work done by the electric field on the charge?

    • +40 J
    • +20 J
    • -20 J
    • -40 J

  18. What is the component of the electric field along an equipotential surface?

    • Infinite
    • Equal to E
    • Zero
    • Maximum

  19. At the midpoint between two equal positive point charges, what is the electric field?

    • Negative
    • Zero
    • Maximum
    • Positive

  20. What is the electric potential at a point 0.50 m from a point charge of +4.0 nanocoulomb?

    • -72 V
    • 72 V
    • 144 V
    • 18 V

All Pearson Edexcel Physics quizzes