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