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4.5.5 The d.c. motor

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Question 25

A current-carrying coil placed in a magnetic field experiences a turning effect.

Three changes are suggested to increase this turning effect:

  1. Increase the cross-sectional area of the coil.
  2. Decrease the number of turns on the coil.
  3. Increase the electric current in the coil.

Which suggestions are correct?

A

1 and 2 only

B

1 and 3 only

C

2 and 3 only

D

1, 2 and 3

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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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