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12.3 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

12.3 The motor effect Questions

  1. GCSE
  2. /Physics
  3. /12.3 The motor effect

86 exam-style questions on Edexcel GCSE Physics 12.3 The motor effect, covering 12.3.1 The motor effect, 12.3.2 Fleming's left-hand rule, 12.3.3 Force on a conductor, and 12.3.4 Electric motors. Each one has a worked solution and a mark scheme showing where the marks go.

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