Electrical Machines
If the excitation is reduced, the power factor is

 unity power factor
None of these
 leading power factor
 lagging power factor

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because

 field system lost residual magnetism
 field resistance was higher than critical resistance
 field winding was wrongly connected
 there was a break in the armature circuit

ANSWER DOWNLOAD EXAMIANS APP