JEE MAIN - Physics (2021 - 20th July Evening Shift - No. 18)
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
Explanation
$$\mu$$ = $$\mu$$0 (1 + xm)
= 4$$\pi$$ $$\times$$ 10$$-$$7 $$\times$$ 500
= 2$$\pi$$ $$\times$$ 10$$-$$4 H/m
= 4$$\pi$$ $$\times$$ 10$$-$$7 $$\times$$ 500
= 2$$\pi$$ $$\times$$ 10$$-$$4 H/m
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