Question

The magnetic susceptibility of a material of a rod is $ \, 499$ . Permeability of vacuum is $4\pi \, \times \, 10^{- 7} \, H \, m^{- 1}$ . Absolute permeability of the material of the rod in $H \, m^{- 1}$ is

• A. $\pi \times 10^{- 4}$
• B. $2\pi \times 10^{- 4}$
• C. $3\pi \times 10^{- 4}$
• D. $4\pi \times 10^{- 4}$

Answer 1

Answer: (B)

We know
$\mu =\left(\mu \right)_{0}\left(1 + X\right)$
$\Rightarrow \mu =500\times 4\pi \times 10^{- 7}$
$\Rightarrow \mu =2\pi \times 10^{- 4}Hm^{- 1}$