Q.

The electric braking system employed with dc shunt motors, in which the armature connections are reversed so that the motor tends to run in opposite direction is called the ____braking 

  • APlugging 
  • BRheostatic
  • CDynamic 
  • DRegenerative 
Correct Answer : (A)

Plugging 

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A dc shunt motor is driving a constant torque load with normal excitation. If the filed current is halved then the motor will run at 

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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

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