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O-LevelPhysicsMagnetism5054/11 · May/June 2016 · Q351 Mark

A split-ring commutator is used in a simple d.c. motor. It reverses the current in the coil. How often does it reverse the current?

Aevery quarter turn
Bevery half turn
Cevery full turn
Devery two turns

✓ Correct answer

B: every half turn

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About this question

Topic
Magnetism, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source
O-Level Physics, May/June 2016 Paper 1 Variant 1, question 35.

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