A dc shunt motor is driving a constant torque load. On inserting an additional resistance in the armature circuit, the speed of the motor will 

  • ARemain unchanged
  • BIncrease
  • CDecrease be zero
  • DBe zero
Correct Answer : (C)

Decrease be zero

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

Join The Discussion