Electrical Machines
The rotor of a three phase induction motor has an impedance of 0.4 + j4 ohm per phase at standstill the maximum torque occurs at a slip of _____________.

 15 %.
 25 %.
 50 %.
  10 %.

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

ANSWER DOWNLOAD EXAMIANS APP