Synchronous Motors For power factor correction, synchronous motors operate at normal load with minimum excitation normal load with zero excitation no-load and greatly over-excited fields no-load and under-excited fields normal load with minimum excitation normal load with zero excitation no-load and greatly over-excited fields no-load and under-excited fields ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The back emf in the stator of a synchronous motor depends on Flux density Rotor speed Rotor excitation None of the listed here Flux density Rotor speed Rotor excitation None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The speed regulation of a synchronous motor is always Zero Positive 1% 0.5% Zero Positive 1% 0.5% ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When the field of a synchronous motor is under-excited, the power factor will be zero unity lagging leading zero unity lagging leading ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A 50 Hz synchronous motor runs at 200 rpm. The number of salient poles on the rotor are______ None of the listed here 16 30 36 None of the listed here 16 30 36 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 high the stator current will be very small the back e.m.f. will be more than the supply voltage the stator current will be zero the stator current will be very high the stator current will be very small the back e.m.f. will be more than the supply voltage ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS