A salient-pole synchronous motor is operating at ¼ full-load :

A salient-pole synchronous motor is operating at ¼ full-load. If its field current is suddenly switched off, it would
(a) stop running
(b) continue to run at asynchronous speed
(c) run at sub-synchronous speed
(d) run at super-synchronous speed

Anurag Mishra Professor Asked on 1st February 2016 in Physics.
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    Answer: (c) run at sub-synchronomous speed 

    Anurag Mishra Professor Answered on 21st May 2016.
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