The magnetic susceptibility of a material of a rod is 499. Permeability in vacuum is 4 π × 10 - 7 H/m. Absolute permeability of the material of the rod is: (a) 4 π × 10 - 4 H/m (b) 2 π × 10 - 4 H/m (c) 3 π × 10 - 4 H/m (d) π × 10 - 4 H/m

Answer: (b). μr = 1 + χ = 500 μ = 500×4π×10⁻⁷ = 2000π×10⁻⁷ = 2π×10⁻⁴ H/m So the answer is (b).

The magnetic susceptibility of a material of a rod is 499… | JEE Main 2021 (20 Jul, Shift 2)

Q38JEE Main 2021 · 20 JUL · SHIFT 2Easy

Magnetisation: B, H, M, χ & μ

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:

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Answer: (b)

$\mu_r = 1 + \chi = 500$
$\mu = 500\times4\pi\times10^{-7} = 2000\pi\times10^{-7} = 2\pi\times10^{-4}\text{ H/m}$
So the answer is (b).

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Magnetisation: B, H, M, χ & μ question from JEE Main 2021 (20 Jul, Shift 2)

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