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For 3-phase induction motor, as load increases from no load towards the full load then the ___________

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For 3-phase induction motor, as load increases from no load towards the full load then the ___________

(a) power factor improves

(b) power factor remains same

(c) power factor varies linearly

(d) power factor increases till 40% load and then decreases

The question was asked in homework.

This intriguing question originated from Starting of Polyphase Induction Motors-II topic in portion Starting of Induction Motors of Electrical Machines

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Best answer
Right option is (a) power factor improves

Best explanation: Overall during the operation power factor improves as the reactance reduces and the power factor angle reduces.

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