The retardation test for dc shunt machines is employed for determination of 

  • AStray losses
  • BWindage and friction losses
  • CMagnetic or core losses
  • DCopper losses
Correct Answer : (A)

Stray losses

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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