Lesson 6.7.2.2

6.7.2.2 Fleming's left-hand rule (HT only) Quiz: AQA Combined Science, Unit 24

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 6.7.2.2, Fleming's left-hand rule (HT only): 20 multiple choice questions for the AQA GCSE Combined Science (8464), Unit 24: Magnetism and electromagnetism, written with Revision Ninja.

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The 20 questions

  1. What is the name of the force that acts between a magnet and a current-carrying conductor?

    • Motor effect
    • Electrostatic effect
    • Gravitational effect
    • Generator effect

  2. Which three quantities are represented by the fingers and thumb in Fleming's left-hand rule?

    • Voltage, current, resistance
    • Energy, force, distance
    • Force, current, field
    • Power, mass, velocity

  3. (HT only) For a conductor at right angles to a magnetic field and carrying a current, the force is given by:

    • F = BIl
    • F = B + I + l
    • F = B / (I l)
    • F = I / (B l)

  4. (HT only) The unit of magnetic flux density is:

    • Tesla (T)
    • Newton (N)
    • Ampere (A)
    • Metre (m)

  5. Which factor affects the size of the magnetic force on a current-carrying conductor?

    • Resistance
    • Magnetic flux density
    • Mass
    • Voltage

  6. (HT only) A 0.5 T field acts at right angles to a 0.1 m wire carrying 2 A. The force is:

    • 2.5 N
    • 0.1 N
    • 1 N
    • 0.02 N

  7. (HT only) A 0.2 m wire carries 5 A at right angles to a 0.4 T field. The force is:

    • 4 N
    • 2 N
    • 0.4 N
    • 0.04 N

  8. (HT only) Doubling the current in a conductor at right angles to a fixed field, with fixed length, makes the force:

    • Double
    • Stay the same
    • Quadruple
    • Halve

  9. At what orientation to a magnetic field does a current-carrying conductor experience zero force?

    • At forty-five degrees
    • Parallel
    • Perpendicular
    • At right angles

  10. In Fleming's left-hand rule, what does the thumb point to?

    • Voltage
    • Magnetic field
    • Force
    • Current

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

    • Resistance
    • Force
    • Magnetic field
    • Current

  12. In Fleming's left-hand rule, what does the second finger show?

    • Force
    • Current
    • Magnetic field
    • Velocity

  13. (HT only) A 0.3 m wire at right angles to a 0.2 T field carries 4 A. The force is:

    • 2.4 N
    • 0.024 N
    • 0.6 N
    • 0.24 N

  14. Which change increases the force on a wire in a fixed magnetic field?

    • Decreasing length
    • Aligning parallel
    • Increasing current
    • Reducing current

  15. (HT only) Reversing the current direction, with the field unchanged, changes the force's:

    • Direction
    • Magnitude only
    • Nothing at all
    • Magnitude to zero

  16. (HT only) A 0.3 m wire carries 2 A at right angles to a field, and the force is 0.6 N. The flux density is:

    • 0.36 T
    • 1 T
    • 0.09 T
    • 3.6 T

  17. What is the force on a wire carrying zero current in a magnetic field?

    • Equal to length
    • Maximum
    • Zero
    • Equal to voltage

  18. (HT only) A 0.25 m wire at right angles to a 0.8 T field carries 3 A. The force is:

    • 0.2 N
    • 0.6 N
    • 2.4 N
    • 0.06 N

  19. (HT only) The unit relationship that makes F = BIl give newtons is:

    • 1 T = 1 N / (A m)
    • 1 T = 1 m / (N A)
    • 1 T = 1 A / (N m)
    • 1 T = 1 N A m

  20. Why is the force between a magnetic field and a current-carrying conductor called the motor effect?

    • It stores charge
    • It creates light
    • It produces movement
    • It generates heat

All AQA Combined Science quizzes