Synchronous Motors The rotor copper losses, in a synchronous motor, are met by c. source supply lines armature input motor input c. source supply lines armature input motor input 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 twice less equal more twice less equal more ANSWER DOWNLOAD EXAMIANS APP
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 In a 3-phase synchronous motor, the negative phase sequence exists when the motor is None of these supplied with unbalanced voltage over-loaded under-loaded None of these supplied with unbalanced voltage over-loaded under-loaded ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on a synchronous motor is increased, its armature current is increased provided, it is ______ Over-excited Under-excited Normally excited All of these Over-excited Under-excited Normally excited All of these ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can develop synchronous torque only at synchronous speed while over-excited when under loaded below or above synchronous speed only at synchronous speed while over-excited when under loaded below or above synchronous speed ANSWER DOWNLOAD EXAMIANS APP
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