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Physics · May / June 2017 · Paper 12 · Question 36

5054The d.c. motor

What is the effect of using a split-ring commutator?

  1. Ait ensures that the current is the same in all parts of a series circuit
  2. Bit generates an alternating electric current
  3. Cit produces a force on a current-carrying coil
  4. Dit reverses the direction of the current in the coil of a motor

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Correct answer: D. it reverses the direction of the current in the coil of a motor

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