Relative permeability μr of a material is related to susceptibility χ by
Aμr = 1 - χ
Bμr = 1 + χ
Cμr = χ - 1
Dμr = 1/χ
Answer & Solution
Correct answer: B. μr = 1 + χ
B = μ0(H + M) = μ0 H(1 + χ), so μ = μ0(1 + χ).
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