Synchronous Motors Change of D.C. excitation of a synchronous motor changes Power factor of power drawn by the motor Motor speed Applied voltage of the motor Any of the above Power factor of power drawn by the motor Motor speed Applied voltage of the motor Any of the above 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. The same as None of the listed here More than Less than The same as None of the listed here More than Less than ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In order to to reverse the direction of a synchronous motor, _______ Interchange any two stator lines Reduce dc field excitation to zero Change supply frequency None of the listed here Interchange any two stator lines Reduce dc field excitation to zero Change supply frequency None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then the stator current will be zero the stator current will be very small the back e.m.f. will be more than the supply voltage the stator current will be very high the stator current will be zero the stator current will be very small the back e.m.f. will be more than the supply voltage the stator current will be very high ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The operating speed of a synchronous motor can be changed to new fixed value by changing the load using brakes changing frequency changing the supply voltage changing the load using brakes changing frequency changing the supply voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The pull out torque of a practical synchronous motor will occur when the torque angle is about _____ 45° 30° 0° 75° 45° 30° 0° 75° ANSWER DOWNLOAD EXAMIANS APP
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