# Which of the following is the correct expression for Curie’s law?

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Which of the following is the correct expression for Curie’s law?

(a) χ = Cμ0T

(b) χ = Cμ0/T

(c) μ0 = C χ T

(d) μ0 = C χ /T

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Right choice is (b) χ = Cμ0/T

To explain: The expression, χ = Cμ0/T, is the correct expression for the Curie’s law. It shows that, for a paramagnetic material, both χ and μ depend not only on the material, but also on the sample temperature.