Synchronous Motors Power factor of a synchronous motor is unity when The armature current is maximum The armature current is minimum None of the listed here The armature current is zero The armature current is maximum The armature current is minimum None of the listed here The armature current is zero ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An over excited synchronous motor is used for Variable speed loads Power factor corrections Low torque loads Fluctuating loads Variable speed loads Power factor corrections Low torque loads Fluctuating loads ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor of synchronous motor is excited with direct current when the motor _____ Approches half synchronous speed Is at standstill None of the listed here Approches synchronous speed Approches half synchronous speed Is at standstill None of the listed here Approches synchronous speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The standard full-load power factor ratings for synchronous motors are unity or 0.8 leading unity or 0.8 lagging zero or 0.8 leading unity or zero unity or 0.8 leading unity or 0.8 lagging zero or 0.8 leading unity or zero ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors While running, a synchronous motor is compelled to run at synchronous speed because of _______ Damper winding in its pole faces Magnetic locking between stator and rotor poles Compulsion due to lenz's law Induced emf in rotor field winding by stator flux Damper winding in its pole faces Magnetic locking between stator and rotor poles Compulsion due to lenz's law Induced emf in rotor field winding by stator flux ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The minimum armature current of the synchronous motor corresponds to operation at 0.707 power factor leading zero power factor leading unity power factor 0.707 power factor lagging 0.707 power factor leading zero power factor leading unity power factor 0.707 power factor lagging ANSWER DOWNLOAD EXAMIANS APP
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