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4.5.5 The d.c. motor

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Question 5

A coil carrying a current in a magnetic field experiences a turning effect. A student suggests three ways to increase this turning effect:

  1. increasing the cross-sectional area of the coil
  2. decreasing the current in the coil
  3. increasing the number of turns on the coil

Which suggestions will successfully increase the turning effect?

A

1, 2 and 3

B

1 and 2 only

C

1 and 3 only

D

2 and 3 only

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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