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/(Ho + H) mWb/m2 where Bo = 2 Wb/m2 and Ho = 100 A/m Find μr when H = 250 A/m.
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