Electrical Machines When a transformer is loaded, the secondary terminal voltage drops. That means power factor is unity. zero. leading. lagging. unity. zero. leading. lagging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous motor is supplying a load at unity power factor. If the load on the motor is increased keeping its excitation and terminal voltage constant, the power factor will remain the same will become leading will become lagging None of these will remain the same will become leading will become lagging None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature of DC motor is laminated to reduce the hysteresis loss. to reduce the mass. to reduce the eddy current loss. to reduce the inductor. to reduce the hysteresis loss. to reduce the mass. to reduce the eddy current loss. to reduce the inductor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor of a 3 - Φ wound induction motor is provided with three phase winding. heavy copper or aluminium bars placed in rotor slots. single phase winding. heavy short-circuited end rings. three phase winding. heavy copper or aluminium bars placed in rotor slots. single phase winding. heavy short-circuited end rings. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase transformer the magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short circuited, the input power factor is 1/3 2/√5 1/√5 1/√2 1/3 2/√5 1/√5 1/√2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hunting in a synchronous cannot be due to windage friction. variable load. variable supply voltage. variable frequency. windage friction. variable load. variable supply voltage. variable frequency. ANSWER DOWNLOAD EXAMIANS APP
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