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Physics · May / June 2016 · Paper 11 · Question 35

5054The d.c. motor

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?

  1. Aevery quarter turn
  2. Bevery half turn
  3. Cevery full turn
  4. Devery two turns

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Correct answer: B. every half turn

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