Electrical Machines Hunting in a synchronous motor takes place when power factor is unity. motor is under loaded. when load varies. when supply voltage fluctuates. when power factor is unity. motor is under loaded. when load varies. when supply voltage fluctuates. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a transformer is loaded, the secondary terminal voltage drops. That means power factor is leading. zero. unity. lagging. leading. zero. unity. lagging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum power developed in cylindrical synchronous machine is occurs at a load angle of 0o. Greater than 90o. 90o. less than 90o. 0o. Greater than 90o. 90o. less than 90o. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the speed of stator rotating magnetic field with respect to rotor rotating magnetic field? Synchronous speed Slip speed Zero None of these Synchronous speed Slip speed Zero None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Number of tappings for each equalizer ring is equal to number of pole pairs. number of commutator segments. number of parallel paths. number of poles. number of pole pairs. number of commutator segments. number of parallel paths. number of poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In 3 - Φ induction motor some times copper bars are placed deep in the rotor to reduce copper loss. improve starting torque. improve power factor. improve efficiency. reduce copper loss. improve starting torque. improve power factor. improve efficiency. ANSWER DOWNLOAD EXAMIANS APP
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