Synchronous Motors When the field of a synchronous motor is under-excited, the power factor will be zero unity leading lagging zero unity leading lagging ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor of a synchronous motor is Salient pole type None of the listed here Identical to that of a dc motor Nonsalient pole type Salient pole type None of the listed here Identical to that of a dc motor Nonsalient pole type ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In case one phase of a three-phase synchronous motor is short-circuited the motor will not start take less than the rated load run with excessive vibrations run at 2/3 of synchronous speed not start take less than the rated load run with excessive vibrations run at 2/3 of synchronous speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The back emf in the stator of a synchronous motor depends on Rotor excitation Rotor speed None of the listed here Flux density Rotor excitation Rotor speed None of the listed here Flux density ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor runs at only one speed because it ______ Is a doubly fed machine None of the listed here Has no losses Has a damper winding Is a doubly fed machine None of the listed here Has no losses Has a damper winding ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors By which of the following methods the constant speed of a synchronous motor can be changed to new fixed value ? By changing the applied voltage By interchanging any two phases By changing the load By changing the supply frequency By changing the applied voltage By interchanging any two phases By changing the load By changing the supply frequency ANSWER DOWNLOAD EXAMIANS APP
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