Plugging of dc machine is normally executed by 

  • AReversing the field polarity 
  • BReversing the armature polarity
  • CReversing both field and armature polarity
  • DConnecting the resistance across armature terminals 
Correct Answer : (B)

Reversing the armature polarity

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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