Electrical Machines When applied rated voltage per phase is reduce to one half, the starting torque of three phase squirrel cage induction motor becomes 1/4 of the intial value twice the initial value 1/2 of the initial value 4 time the initial value 1/4 of the intial value twice the initial value 1/2 of the initial value 4 time the initial value ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a transformer is loaded, the secondary terminal voltage drops. That means power factor is leading. unity. lagging. zero. leading. unity. lagging. zero. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC motors has almost constant speed over their full load range? Shunt. Compound (cummolative). none of these. Series. Shunt. Compound (cummolative). none of these. Series. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The heat generated in the transformer is dissipated mainly by conduction. convection. All of these radiation. conduction. convection. All of these radiation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous motor will deliver maximum power when load angle is equal to internal angle θ. load angle is 0°. input power factor is unity. load angle is 45°. load angle is equal to internal angle θ. load angle is 0°. input power factor is unity. load angle is 45°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine, the angle between the stator and rotor fields is 0o. 90o. 180o. dependent upon the load. 0o. 90o. 180o. dependent upon the load. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS