Synchronous Motors The direction of rotation of a synchronous motor can be reversed by reversing, Current to field winding Supply phase sequence Polarity of rotor poles None of the listed here Current to field winding Supply phase sequence Polarity of rotor poles None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous machine with low value of short-circuit ratio has good voltage regulation lower stability limit good speed regulation high stability limit good voltage regulation lower stability limit good speed regulation high stability limit ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In case one phase of a three-phase synchronous motor is short-circuited the motor will not start run with excessive vibrations take less than the rated load run at 2/3 of synchronous speed not start run with excessive vibrations take less than the rated load run at 2/3 of synchronous speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An over excited synchronous motor behaves as _____ None of the listed here A capacitor A resistor An inductor None of the listed here A capacitor A resistor An inductor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The operating speed of a synchronous motor can be changed to new fixed value by using brakes changing the supply voltage changing the load changing frequency using brakes changing the supply voltage changing the load changing frequency ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors While running, a synchronous motor is compelled to run at synchronous speed because of _______ Damper winding in its pole faces Induced emf in rotor field winding by stator flux Magnetic locking between stator and rotor poles Compulsion due to lenz's law Damper winding in its pole faces Induced emf in rotor field winding by stator flux Magnetic locking between stator and rotor poles Compulsion due to lenz's law ANSWER DOWNLOAD EXAMIANS APP
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