JEE PHYSICS MCQ: MAGNETISM AND MATTER

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When a piece of a ferromagnetic substance is put in a uniform magnetic field, the flux density inside it is four times the flux density away from the piece. The magnetic permeability of the material(in

\mathrm{N}/{\mathrm{A}^2}

) is

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Correct option: D

Option D (4) is correct because magnetic permeability is the ratio of magnetic flux density inside the material to the magnetic field strength, which is given as 4 in this case.

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\mu_{\mathrm{d}}, \mu_{\mathrm{p}}

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