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The load current at which maximum efficiency occurs is independent of the load power factor.

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The load current at which maximum efficiency occurs is independent of the load power factor.

(a) True

(b) False

I had been asked this question in an interview.

Origin of the question is Transformer Losses and Efficiency topic in chapter Transformers of Electrical Machines

1 Answer

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Correct answer is (b) False

Explanation: Because Core losses and the effective resistance of the secondary are almost unaffected by load p.f.

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