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What is the hysteresis loss of permalloy?

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What is the hysteresis loss of permalloy?

(a) 500

(b) 120

(c) 40

(d) 21

This question was addressed to me by my college director while I was bunking the class.

This interesting question is from Soft and Hard Magnetic Materials topic in chapter Magnetic & Insulating Materials of Engineering Material & Metallurgy

1 Answer

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Correct option is (b) 120

Explanation: Hysteresis loss of soft magnetic materials is generally kept low due to the small area. This value resides at 120 J m^-3 for permalloy and even lower at 21 J m^-3 for supermaloy.

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