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If the field poles are ahead of resultant mmf, then the 3-phase synchronous machine is operating as ___________

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If the field poles are ahead of resultant mmf, then the 3-phase synchronous machine is operating as ___________

(a) generator

(b) motor

(c) reluctance motor

(d) any of the mentioned

I got this question in an interview for job.

Question is from Physical Concepts of Synchronous Machine Operation in chapter Synchronous Machines of Electrical Machines

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Best answer
The correct answer is (a) generator

The best I can explain: Field mmf leads the resultant mmf so it is generator.

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