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The magnetic susceptibility of the material of a rod is 499. Permeability of vaccum is $4 \pi \times 10^{-7} \mathrm{H} / \mathrm{m}$. Absolute permeability of the material of the rod in $\mathrm{H} / \mathrm{m}$ is:
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Verified Answer
The correct answer is:
$2 \pi \times 10^{-4}$
Magnetic susceptibility, $\chi=499$
$\mu_0=4 \pi \times 10^{-7} \mathrm{H} / \mathrm{m}$
Relative permeability of the rod,
$\mu_r=1+\chi=1+499=500$
Absolute permeability, $\mu=\mu_r \mu_0$
$=500 \times 4 \pi \times 10^{-7}$
$=20 \pi \times 10^{-5}$
$=2 \pi \times 10^{-4}$
$\mu_0=4 \pi \times 10^{-7} \mathrm{H} / \mathrm{m}$
Relative permeability of the rod,
$\mu_r=1+\chi=1+499=500$
Absolute permeability, $\mu=\mu_r \mu_0$
$=500 \times 4 \pi \times 10^{-7}$
$=20 \pi \times 10^{-5}$
$=2 \pi \times 10^{-4}$
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