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The magnitude of rotating flux _____________ at all instants of time.

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The magnitude of rotating flux _____________ at all instants of time.

(a) Changes

(b) Remains constant

(c) Pulsates

(d) Any of the mentioned

I had been asked this question in an online interview.

This question is from Rotating Magnetic Field in chapter Basic Concepts in Rotating Machines of Electrical Machines

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Best answer
Correct option is (b) Remains constant

Best explanation: FR = 3/(2Fm) (for a 3 phase machine). A constant amplitude rotating MMF or rotating field is produced in the air gap of a three phase machine.

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