Synchronous Motors The power factor of a synchronous motor is better than that of induction motor because synchronous motor has large air gap synchronous motor runs at synchronous speed stator supply is relieved of responsibility of producing magnetic field mechanical load on the motor can be adjusted synchronous motor has large air gap synchronous motor runs at synchronous speed stator supply is relieved of responsibility of producing magnetic field mechanical load on the motor can be adjusted ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The mechanical power developed by a synchronous motor is ______ stator voltage. Directly proportional to Directly proportional to square of Independent of Invesely proportional to Directly proportional to Directly proportional to square of Independent of Invesely proportional to ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor which loss varies with load ? Copper loss Bearing friction loss Windage loss Core loss Copper loss Bearing friction loss Windage loss Core loss ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor of synchronous motor is excited with direct current when the motor _____ Is at standstill Approches synchronous speed None of the listed here Approches half synchronous speed Is at standstill Approches synchronous speed None of the listed here Approches half synchronous speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The induced e.m.f. in a synchronous motor working on leading power factor will be None of these more than the supply voltage equal to the supply voltage less than the supply voltage None of these more than the supply voltage equal to the supply voltage less than the supply voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When the field of a synchronous motor is under-excited, the power factor will be lagging zero leading unity lagging zero leading unity ANSWER DOWNLOAD EXAMIANS APP