First slide

Magnetic properites of materials.

Question

The magnetic susceptibility of a material of a rod is 499. Permeability of vacuum is 4 $π$ x 10^-7 Wm. Absolute permeability of the material of the rod in henry/metre is

Easy

A

$π$ x 10^-4
B

2 $π$ x 10^-4
C

3 $π$ x 10^-4
D

4 $π$ x 10^-4

Solution

The magnetic susceptibility is given by
$χ_{m} = \frac{μ}{μ_{0}} - 1 μ = μ_{0} (1 + χ_{m}) = 4 π \times 10^{- 7} (1 + 499) = 2 π \times 10^{- 4} H / m$

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