Electrical Machines
If the back emf in DC motor vanishes suddenly the motor will

 burn.
 start haunting.
 run at very low speed.
 run at very high speed.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
With the increase in speed of DC motor

 Both back emf as well as line current fall.
 Both back emf as well as line current increase.
 Back emf falls and line current increase.
  Back emf increase but line current falls.

ANSWER DOWNLOAD EXAMIANS APP