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