Electrical Machines
The change in speed of a DC generator due to increased load is corrected by

  increasing terminal voltage.
  increasing armature resistance.
 increasing armature cooling.
  increasing input power of the prime mover.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Interpoles in a DC motor must be

 Shunt excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature.
 Series excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature.
 Shunt excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature.
 Series excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature.

ANSWER DOWNLOAD EXAMIANS APP