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A substance whose permeability is more than the permeability of free space is?(a) Diamagnetic(b) Paramagnetic(c) Ferromagnetic(d) Both paramagnetic and ferromagneticI have been asked this question during an internship interview.This question is from Permeability of Free Space or Magnetic Constant in section Simple Magnetic Circuits of Basic Electrical Engineering

Answer»

Right answer is (d) Both paramagnetic and ferromagnetic

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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