Stability of a synchronous machine:

Synchronous Motors 14/04/2021

A. decreases with increase in its excitation
B. increases with increase in its excitation
C. remains unaffected with increase in excitation
D. any of the above

Related Mcqs:

    The mechanical displacement of the rotor with respect to the stator, in polyphase multipolar synchronous motors running at full load, is of the order of_____________?
    A. zero degree B. two degrees C. five degrees D. ten degrees...
    If one-phase of a 3-phase synchronous motor is short-circuited, motor will ______________?
    A. will refuse to start B. will overheat in spots C. will not come upto speed D. will fail to pull into step...
    The operating speed of a synchronous motor can be changed to new fixed value by___________?
    A. changing the load B. changing the supply voltage C. changing frequency D. using brakes...
    The percentage slip in case of a synchronous motor is____________?
    A. 1% B. 100% C. 0.5% D. zero...
    The coupling angle or load angle of synchronous motor is defined as the angle between the__________?
    A. rotor and stator teeth B. rotor and the stator poles of opposite polarity C. rotor and the stator poles of the same polarity D. none of the above...

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