Synchronous Motors When the field of a synchronous motor is under-excited, the power factor will be leading unity zero lagging leading unity zero lagging ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The armature current of a synchronous motor will be minimum for ______ power factor. 0.8 leading Unity 0.8 lagging None of the listed here 0.8 leading Unity 0.8 lagging None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The maximum speed variation in a 3 phase synchronous motor is 4 percent Zero 10 percent 2 percent 4 percent Zero 10 percent 2 percent 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 Change of D.C. excitation of a synchronous motor changes Any of the above Applied voltage of the motor Motor speed Power factor of power drawn by the motor Any of the above Applied voltage of the motor Motor speed Power factor of power drawn by the motor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For power factor correction, synchronous motors operate at normal load with minimum excitation no-load and under-excited fields normal load with zero excitation no-load and greatly over-excited fields normal load with minimum excitation no-load and under-excited fields normal load with zero excitation no-load and greatly over-excited fields ANSWER DOWNLOAD EXAMIANS APP
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