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.Management Sciences
A. zero
B. one
C. two
D. infinity
Related Mcqs:
- 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 magnitude of stator back e.m.f. Eb depends on___________?
- A. load on the motor B. d.c. excitation only C. both the speed and rotor flux D. none of the above...
- A synchronous motor can be used as a synchronous capacitor when it is____________?
- A. under-loaded B. over-loaded C. under-excited D. over-excited...
- The oscillations in a synchronous motor can be damped out by_______________?
- A. maintaining constant excitation B. running the motor on leading power factors C. providing damper bars in the rotor pole faces D. oscillations cannot be damped...
- 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...
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