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A substance whose relative permeability is more than the permeability of free space is?(a) Diamagnetic(b) Paramagnetic(c) Ferromagnetic(d) Both paramagnetic and ferromagnetic |
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Answer» The correct option is (d) Both paramagnetic and ferromagnetic The explanation: 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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