Synchronous Motors The angle between the rotor poles and stator poles, in a synchronous motor, is known as Synchronising angle Torque angle Angle of retardation Power factor angle Synchronising angle Torque angle Angle of retardation Power factor angle ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors As the load is applied to a synchronous motor, the motor takes more armature current because The rotor strengthens the rotating field causing more motor current The rotor by shifting its phase backward causes motor to take more current The back e.m.f. decreases causing an increase in motor current The increased load has to take more current The rotor strengthens the rotating field causing more motor current The rotor by shifting its phase backward causes motor to take more current The back e.m.f. decreases causing an increase in motor current The increased load has to take more current ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In order to to reverse the direction of a synchronous motor, _______ Change supply frequency None of the listed here Interchange any two stator lines Reduce dc field excitation to zero Change supply frequency None of the listed here Interchange any two stator lines Reduce dc field excitation to zero ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The power factor correction capability of a loaded synchronous motor _____ with the increases in mechanical load. Increases Decreases None of the listed here Remains unchanged Increases Decreases None of the listed here Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For power factor correction, synchronous motors operate at no-load and greatly over-excited fields no-load and under-excited fields normal load with zero excitation normal load with minimum excitation no-load and greatly over-excited fields no-load and under-excited fields normal load with zero excitation normal load with minimum excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a 3-phase synchronous motor, the negative phase sequence exists when the motor is under-loaded over-loaded supplied with unbalanced voltage None of these under-loaded over-loaded supplied with unbalanced voltage None of these ANSWER DOWNLOAD EXAMIANS APP
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