By looking at which particular part of the motor we can Identify a “DC motor”?

By looking at which particular part of the motor we can Identify a "DC motor"?

Right Answer is:

Commutator

SOLUTION

  • The commutator converts the alternating current generated in armature into the unidirectional current.
  • It is a mechanical rectifier, so the commutator collects induced EMF or current developed in the armature.
  • In the DC motor, the commutator is used to alternate the magnetic field created by the DC current.
  • For AC motor the magnetic field is already alternated by the nature of the AC current.
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