Synchronous Motors When pull-out torque occurs in a synchronous motor, the poles of the rotor are _______ None of the listed here Mid way between N and S poles of stator 45° (electrical) behind stator poles Coincident with statorbpoles None of the listed here Mid way between N and S poles of stator 45° (electrical) behind stator poles Coincident with statorbpoles 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
Synchronous Motors For the same active power consumed, the stator current of a synchronous motor is ______ that of a 3 phase induction motor. None of the listed here More than The same as Less than None of the listed here More than The same as Less than ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can operate at Unity power factor only Leading power factor Lagging, leading and unity power factors Lagging power factor only Unity power factor only Leading power factor Lagging, leading and unity power factors Lagging power factor only ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a 3-phase synchronous motor, the negative phase sequence exists when the motor is under-loaded supplied with unbalanced voltage over-loaded None of these under-loaded supplied with unbalanced voltage over-loaded None of these ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The net armature voltage of a synchronous motor is equal to the vector sum of Eb and V vector difference of Eh and V arithmetic sum of Eb and V arithmetic difference of Eb and V vector sum of Eb and V vector difference of Eh and V arithmetic sum of Eb and V arithmetic difference of Eb and V ANSWER DOWNLOAD EXAMIANS APP
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