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4.5.5 The d.c. motor

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Question 9

In a direct current (d.c.) motor, a rectangular coil of wire is suspended in a magnetic field. To ensure that the coil continues to rotate in the same direction, the current through the coil must reverse every half-turn (180∘180^\circ180∘).

Which component is responsible for reversing the connection of the coil to the external power supply every half-turn?

A

The carbon brushes

B

The permanent magnets

C

The split-ring commutator

D

The slip rings

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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