In a synchronous motor running with fixed excitation, when the load is increased three times, its torque angle becomes approximately

Related Mcqs:

In case one phase of a three-phase synchronous motor is short-circuited the motor will____________?

A. not start B. run at 2/3 of synchronous speed C. run with excessive vibrations D. take less than the rated load...

The induced e.m.f. in a synchronous motor working on leading power factor will be_____________?

A. more than the supply voltage B. less than the supply voltage C. equal to the supply voltage D. None of these...

In a synchronous motor, the maximum power developed depends on all of the following except:

A. rotor excitation B. maximum value of coupling angle C. direction of rotation D. supply voltage...

In a synchronous motor, the magnitude of stator back e.m.f. & depends on_______________?

A. d.c. excitation only B. speed of the motor C. load on the motor D. both the speed and rotor flux...

A synchronous motor is running with normal excitation. When the load is increased, the armature current drawn by it increases because

A. speed of the motor is reduced B. power factor is decreased C. Eb (back e.m.f.) becomes less than V (applied voltage) D. Er (net resultant voltage) in armature is increased E. none of the above...