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 stator current will be very high the back e.m.f. will be more than the supply voltage the stator current will be zero the stator current will be very small the stator current will be very high the back e.m.f. will be more than the supply voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Small synchronous motors are started by _______ None of the listed here Damper winding Pony motor Variable frequency source None of the listed here Damper winding Pony motor Variable frequency source ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The operating speed of a synchronous motor can be changed to new fixed value by changing frequency using brakes changing the load changing the supply voltage changing frequency using brakes changing the load changing the supply voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An under excited synchronous motor behaves as_______ A capacitor A resistor An inductor None of the listed here A capacitor A resistor An inductor None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous machine with low value of short-circuit ratio has lower stability limit good voltage regulation high stability limit good speed regulation lower stability limit good voltage regulation high stability limit good speed regulation 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 more less equal twice more less equal twice ANSWER DOWNLOAD EXAMIANS APP
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