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
Correct Answer:
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Q15: As the load is applied to a
Q16: Synchronous motor always runs at
A)the synchronous speed
B)less
Q17: An over-excited synchronous motor takes
A)leading current
B)lagging current
C)both
Q18: The working of a synchronous motor is
Q19: The minimum armature current of the synchronous
Q21: If load (or torque) angle of a
Q22: For V-curves for a synchronous motor the
Q23: The back e.m.f. of a synchronous motor
Q24: A synchronous motor can operate at
A)lagging power
Q25: In a synchronous motor which loss varies
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