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12 Magnetism and the motor effect

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Question 4

A motor turns a display platform clockwise when viewed from above. A control switch stops the motor and reverses the direction of current supplied to it. The permanent magnet is unchanged and the split-ring commutator continues to operate correctly. Which describes the movement of the platform when the motor is restarted?

[1]
A

Stops after completing half a turn

B

Rotates clockwise continuously

C

Rotates anticlockwise continuously

D

Alternates direction after every half-turn

Markscheme

12 Magnetism and the motor effect Questions

  1. GCSE
  2. /Physics
  3. /12 Magnetism and the motor effect

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