An electromagnet is made of a ferromagnetic material whose magnetization curve can be approximated by B(H) =

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An electromagnet is made of a ferromagnetic material whose magnetization curve can be approximated by B(H) = BoH/(H+ H) mWb/mwhere B= 2 Wb/m2 and H= 100 A/m Find μr when H = 250 A/m.

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