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Hysteresis loss in a dc machine is _____ of rate of flow of air and _____ on frequency of _____

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Hysteresis loss in a dc machine is _____ of rate of flow of air and _____ on frequency of _____

(a) independent, dependent, magnetic reversal

(b) independent, dependent, operation

(c) dependent, independent, magnetic reversal

(d) none of the mentioned

This question was posed to me at a job interview.

Question is taken from Losses and Efficiency in chapter Rating and Loss Dissipation of Electrical Machines

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The correct answer is (a) independent, dependent, magnetic reversal

To explain: Hysteresis loss in a dc machine is independent of rate of flow of air and depends on frequency of magnetic reversal.

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