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From the above graph of the core losses per cycle is, the hysteresis losses per phase for a transformer at a operating frequency of 40 Hz is?

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From the above graph of the core losses per cycle is, the hysteresis losses per phase for a transformer at a operating frequency of 40 Hz is?

(a) 20W

(b) 30W

(c) 80W

(d) 32W

I had been asked this question during an internship interview.

My question is based upon Transformer Losses and Efficiency topic in chapter Transformers of Electrical Machines

1 Answer

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Correct option is (a) 20W

Easiest explanation: Ph = k1*f = 0.5*40 = 20W.

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