Hysteresis loss in a dc machine is independent of 

  • AVolume and grade of iron 
  • BFrequency of magnetic reversals 
  • CRate of flow of air
  • DMaximum value of flux density 
Correct Answer : (C)

Rate of flow of air

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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