Synchronous Motors A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have leading power factor with over-excitation no change of power factor lagging power factor with over-excitation leading power factor with under-excitation leading power factor with over-excitation no change of power factor lagging power factor with over-excitation leading power factor with under-excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor working at leading power factor can be used as Phase advancer Noise generator Mechanical synchronizer Voltage booster Phase advancer Noise generator Mechanical synchronizer Voltage booster ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The back emf in the stator of a synchronous motor depends on Rotor speed None of the listed here Flux density Rotor excitation Rotor speed None of the listed here Flux density Rotor excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors While running, a synchronous motor is compelled to run at synchronous speed because of _______ Induced emf in rotor field winding by stator flux Magnetic locking between stator and rotor poles Compulsion due to lenz's law Damper winding in its pole faces Induced emf in rotor field winding by stator flux Magnetic locking between stator and rotor poles Compulsion due to lenz's law Damper winding in its pole faces ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The percentage slip in case of a synchronous motor is 0.005 1 zero 0.01 0.005 1 zero 0.01 ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If a synchronous motor is operating at a supply frequency of 50 cycles/second, then, rotor revolves at ______ 100 cycles/second 25 cycles/ second 50 cycles/second None of the listed here 100 cycles/second 25 cycles/ second 50 cycles/second None of the listed here ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS