Electrical Machines
A 2 KVA transformer has iron loss of 150 W and full load copper loss of 250 W. The maximum efficiency of the transformer would occur when the total loss is

 400W
 500 W
 250 W
 300 W

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Armature reaction in a DC machine

 makes an angle with the main pole axis which is load dependent.
  makes an angle of 90° with the main pole axis.
 is in the same direction as the main poles.
 is in direct opposition to the main poles.

ANSWER DOWNLOAD EXAMIANS APP