Q 12-05-058JEE MainJEE Main 2021 (20 Jul, Shift 2)Easy
The magnetic susceptibility of a material of a rod is 499. Permeability in vacuum is $4\pi\times10^{-7}\ \text{H m}^{-1}$. Absolute permeability of the material of the rod is
Answer: (B) $2\pi\times10^{-4}\ \text{H m}^{-1}$
$\mu = \mu_0(1 + \chi) = 4\pi\times10^{-7}\times500 = 2\pi\times10^{-4}\ \text{H m}^{-1}$
Solution by Sreeraj P, M.Sc Physics