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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 ferromagneticThis question was posed to me in my homework.This interesting question is from Relative Permeability topic in portion Simple Magnetic Circuits of Basic Electrical Engineering

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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