Lesson 4.7.2.2

4.7.2.2 Fleming's left-hand rule (HT only) Quiz: AQA Physics, Unit 7

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

In partnership with Revision Ninja

Lesson 4.7.2.2, Fleming's left-hand rule (HT only): 20 multiple choice questions for the AQA GCSE Physics (8463), Unit 7: Magnetism and electromagnetism, 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 name is given to the force between a current-carrying conductor and a magnetic field?

    • Photoelectric effect
    • Motor effect
    • Dynamo effect
    • Generator effect

  2. What three quantities does Fleming's left-hand rule represent?

    • Mass, velocity, force
    • Power, energy, time
    • Voltage, current, resistance
    • Force, current, field

  3. (Higher tier) Which equation gives the force on a conductor at right angles to a magnetic field?

    • F = Bv/I
    • F = mv
    • F = ma
    • F = BIl

  4. In the equation F = BIl, what does the letter B represent?

    • Magnetic force
    • Magnetic flux density
    • Magnetic field strength
    • Flux linkage

  5. (Higher tier) What is the unit of magnetic flux density?

    • Tesla
    • Newton
    • Ampere
    • Metre

  6. (Higher tier) A conductor at right angles to a 0.5 T field carries 2 A and is 0.1 m long. What is the force?

    • 0.5 N
    • 0.1 N
    • 10 N
    • 1 N

  7. (Higher tier) A 0.2 m conductor carries 3 A at right angles to a 0.4 T field. What is the force?

    • 0.6 N
    • 0.06 N
    • 2.4 N
    • 0.24 N

  8. Which change increases the magnetic force on a current-carrying conductor?

    • Shortening length
    • Increasing current
    • Increasing resistance
    • Decreasing current

  9. When is the magnetic force on a current-carrying conductor equal to zero?

    • Parallel to field
    • Perpendicular to field
    • At forty-five degrees
    • In a uniform field

  10. Which factor does not affect the size of the force on a conductor?

    • Current
    • Magnetic flux density
    • Length
    • Colour

  11. In Fleming's left-hand rule, what does the first finger represent?

    • Force
    • Magnetic field
    • Velocity
    • Current

  12. What happens to the force if current through a conductor in a field reverses?

    • It doubles
    • It reverses
    • It halves
    • It becomes zero

  13. (Higher tier) A wire is placed in a magnetic field and carries a current, and a force acts on it. Which effect is this?

    • The motor effect
    • Induced magnetism
    • Electrostatic induction
    • The generator effect

  14. (Higher tier) What is the force on a conductor at right angles to a 1 T field carrying 1 A over a length of 1 m?

    • 1 A
    • 1 T
    • 1 N
    • 1 kg

  15. (Higher tier) A 0.3 m conductor at right angles carries 5 A and experiences a force of 0.75 N. What is the field strength?

    • 0.45 T
    • 1.25 T
    • 0.5 T
    • 2.25 T

  16. If the length of a conductor in a magnetic field doubles, what happens to the force?

    • It quadruples
    • It halves
    • It stays same
    • It doubles

  17. Doubling current doubles force while other factors remain constant. What does this show?

    • Exponential growth
    • Direct proportionality
    • Inverse square law
    • Constant velocity

  18. (Higher tier) In F = BIl, the current must be measured in which unit?

    • Watts
    • Ohms
    • Amperes
    • Volts

  19. Which device works because of the motor effect?

    • Loudspeaker
    • Thermistor
    • Generator
    • Transformer

  20. (Higher tier) A conductor at right angles to a field has a force of 0.6 N, a field of 0.3 T and a current of 2 A. What is its length?

    • 2 m
    • 1 m
    • 0.5 m
    • 0.25 m

All AQA Physics quizzes