Electrical Machines
Flashing the field of DC generator means

  neutralising residual magnetism.
  creating residual magnetism by a DC source.
 increasing flux density by adding extra turns of winding.
  making the magnetic losses forces parallel.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
An alternator is feeding an infinite busbar. Its prime mover is suddenly shutdown. The alternator will

 continue to work as synchronous motor with same direction of rotation.
 come to stand still.
 start working as induction motor.
 continue to work as alternator but the direction of rotation will reverse.

ANSWER DOWNLOAD EXAMIANS APP