Two three phase induction motors A and B are identical in all respects except that motor A has a larger air-gap than motor B. Which motor will have poorer power factor?

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Mr. Dubey

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Q. Two three phase induction motors A and B are identical in all respects except that motor A has a larger air-gap than motor B. Which motor will have poorer power factor?

(A) a
(B) b
(C) both a and b
(D) neither a nor b

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✅ Correct Answer: (A) a

Explanation: due to larger air gap of motor a, it will need more of exciting current. so the no load angle will increase and power factor will deteriorate.

Explanation by: Mr. Dubey

due to larger air gap of motor a, it will need more of exciting current. so the no load angle will increase and power factor will deteriorate.

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