Core loss in a dc machine occurs in

  • AArmature only 
  • BPole shoe only
  • CYoke only
  • DIn all the above three
Correct Answer : (A)

Armature only 

Hints :

The current drawn by a 120 V dc motor with back emf of 110 V and armature resistance of 0.4 ohm is


With the increase in speed of a dc motor

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