Table P30.70 contains data taken for a ferromagnetic material.
(a) Construct a magnetization curve from the data. Remember that B = B0 + μ0M.
(b) Determine the ratio B/B0 for each pair of values of B and B0, and construct a graph of B/B0 versus B0. (The fraction B/B0 is called the relative permeability, and it is a measure of the induced magnetic field.)

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Table P30.70 B (T) 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 L.S 砌(T) 4.8 × 10-5 7.0 × 10-5 8.8× 10-5 1.2× 10-4 1.8 × 10-4 3.1 × 10-4 8.7× 10-4 3.4 × 10-3 1.2 × 10-1