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What is the relative permeability of iron?

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in Engineering Material & Metallurgy by (773k points)
What is the relative permeability of iron?

(a) 250

(b) 1500

(c) 2700

(d) 100,000

This question was posed to me in exam.

This intriguing question originated from Soft and Hard Magnetic Materials in section Magnetic & Insulating Materials of Engineering Material & Metallurgy

1 Answer

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Right answer is (a) 250

For explanation I would say: Relative permeability is the measure of the effective permeability of a material. Commercial iron has a relative permeability of 250. The values of relative permeability of Fe-Si, permalloy, and supermaloy are 1500, 2700, and 100000 in that order.

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