Electrical Machines
In a DC machine, which of these parameters remain the same whether it runs as a DC motor or a DC generator?

 Can not be determined.
 Armature current.
 Induced emf.
 Mechanical power.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
What is/are the necessary conditions for voltage build up in self excited generator?

All of these
 Poles should contain residual flux.
 Field winding should be properly connected to armature winding.
 Field winding resistance should be less than critical resistance.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The synchronous motor can be started by

  coupling it with a small AC induction motor called the pony motor.
  any of the above methods.
  providing damper winding in its rotor circuit.
  coupling it with a DC compound motor.

ANSWER DOWNLOAD EXAMIANS APP