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Ferromagnetic Material

Question

Is the permeability of a ferromagnetic material independent of the magnetic field? If not, is it more for lower or higher fields?

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Solution

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No, the permeability of a ferromagnetic material depends upon the applied magnetic. Field. Its value is large for the small values of the applied field. The graph between $$ B $$ and $$ H $$ is of the shapes as shown:-
It follows that value $$ B$$ is quite large for comparatively small values of $$ H$$.

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