A dc shunt motor is driving a mechanical load at rated voltage with normal excitation. If the load torque is increased to double of the normal one, the speed of the motor will

  • ABecome half
  • BBecome double
  • CIncrease slightly
  • DFall slightly
Correct Answer : (D)

Fall slightly

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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