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4.5.5 The d.c. motor

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Question 7

A rectangular current-carrying coil is placed in a uniform magnetic field between two magnetic poles.

Which of the following changes would result in a decrease in the turning effect experienced by the coil?

A

Increasing the current in the coil.

B

Reducing the number of turns of wire in the coil.

C

Replacing the magnets with stronger permanent magnets.

D

Wrapping the coil around a soft iron cylinder.

Markscheme

4.5.5 The d.c. motor Questions

  1. IGCSE
  2. /Physics
  3. /4.5.5 The d.c. motor

31 exam-style questions on CIE IGCSE Physics 4.5.5 The d.c. motor. Each one has a worked solution and a mark scheme showing where the marks go.

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