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A substance whose relative permeability is more than the permeability of free space is?

A substance whose relative permeability is more than the permeability of free space is? Correct Answer Both paramagnetic and ferromagnetic

Relative permeability=1+Magnetic susceptibility Since both paramagnetic and ferromagnetic materials have positive susceptibility, their relative permeability is greater than unity i.e. their permeability is more than the permeability of free space.

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A substance whose relative permeability is less than the permeability of free space is?
A substance whose permeability is more than the permeability of free space is?
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