Synchronous Motors As the load is applied to a synchronous motor, the motor takes more armature current because The back e.m.f. decreases causing an increase in motor current The increased load has to take more current The rotor by shifting its phase backward causes motor to take more current The rotor strengthens the rotating field causing more motor current The back e.m.f. decreases causing an increase in motor current The increased load has to take more current The rotor by shifting its phase backward causes motor to take more current The rotor strengthens the rotating field causing more motor current ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor, the rotor copper loss are met by ______ Dc source Armature input Motor input Supply lines Dc source Armature input Motor input Supply lines ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a unity pf synchronous motor is operated at a leading pf, it results in _______ None of the listed here More than rated rotor current Less than rated horsepower output More than rated horseppwer output None of the listed here More than rated rotor current Less than rated horsepower output More than rated horseppwer output ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Mostly, synchronous motors are of Alternator type machines Induction type machines Smooth cylindrical type machines Salient pole type machines Alternator type machines Induction type machines Smooth cylindrical type machines Salient pole type machines ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Dust and dirt accumulation on motor winding will result in Eddy current flow Rise in winding temperature Shorting of coils Increased core losses Eddy current flow Rise in winding temperature Shorting of coils Increased core losses ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor of synchronous motor is excited with direct current when the motor _____ None of the listed here Approches synchronous speed Is at standstill Approches half synchronous speed None of the listed here Approches synchronous speed Is at standstill Approches half synchronous speed ANSWER DOWNLOAD EXAMIANS APP
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