Synchronous Motors When pull-out torque occurs in a synchronous motor, the poles of the rotor are _______ Mid way between N and S poles of stator Coincident with statorbpoles 45° (electrical) behind stator poles None of the listed here Mid way between N and S poles of stator Coincident with statorbpoles 45° (electrical) behind stator poles None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The mechanical power developed by a synchronous motor is ______ stator voltage. Directly proportional to Invesely proportional to Independent of Directly proportional to square of Directly proportional to Invesely proportional to Independent of Directly proportional to square of ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The mechanical power developed by a synchronous motor is independent of _________. Field excitation Torque angle Speed Applied stator voltage Field excitation Torque angle Speed Applied stator voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a synchronous motor is pulled out of synchronism, the stator current ________ Is decreased too much Remains unchanged Is increased too much Become zero Is decreased too much Remains unchanged Is increased too much Become zero ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In order to to reverse the direction of a synchronous motor, _______ None of the listed here Reduce dc field excitation to zero Interchange any two stator lines Change supply frequency None of the listed here Reduce dc field excitation to zero Interchange any two stator lines Change supply frequency ANSWER DOWNLOAD EXAMIANS APP
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