Electrical Machines
Under which of the following conditions hunting of synchronous motor is likely to occur ?

  Small and constant load.
  Over-loading for long period.
  Over-excitation.
  Periodic variation of load.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a DC shunt generator working on load, the brushes are moved forward in the direction of rotation, as a result of this, commutation will

  worsen and terminal voltage will rise.
  worsen and terminal voltage will fall
  improve and terminal voltage will rise .
 improve but terminal voltage will fall.

ANSWER DOWNLOAD EXAMIANS APP