Synchronous Motors The direction of rotation of a synchronous motor can be reversed by reversing, 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 Current to field winding ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor, the maximum power developed depends on all of the following except direction of rotation rotor excitation supply voltage maximum value of coupling angle direction of rotation rotor excitation supply voltage maximum value of coupling angle ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous machine with low value of short-circuit ratio has good speed regulation good voltage regulation high stability limit lower stability limit good speed regulation good voltage regulation high stability limit lower stability limit ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If the field of a synchronous motor is underexcited, the power factor will be unity lagging zero leading unity lagging zero leading ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Small synchronous motors are started by _______ Pony motor Damper winding None of the listed here Variable frequency source Pony motor Damper winding None of the listed here Variable frequency source ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on an over-excited or under excited synchronous motor is increased, rate of change of its armature current as compared with that of power factor is equal more twice less equal more twice less ANSWER DOWNLOAD EXAMIANS APP
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