The magnetic susceptibility of a material of a rod is 499. Permeability in vacuum is 4$\pi$ $\times$ 10$-$7 H/m. Absolute permeability of the material of the rod is :
4$\pi$ $\times$ 10$-$4 H/m
2$\pi$ $\times$ 10$-$4 H/m
3$\pi$ $\times$ 10$-$4 H/m
$\pi$ $\times$ 10$-$4 H/m
Solution
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