Question

The susceptibility of a paramagnetic material is $99$ . The permeability of the material in $Wb / A - m$ is : [Permeability of free space $\mu_{0}=4 \pi \times 10^{-7} Wb / A - m$ ]

• A. $4 \pi \times 10^{-7}$
• B. $4 \pi \times 10^{-4}$
• C. $4 \pi \times 10^{-5}$
• D. $4 \pi \times 10^{-6}$

Answer 1

Answer: (C)

Susceptibility $\chi=99$
$\mu_{r}=\frac{\mu}{\mu_{0}}=1+\chi$
$\mu=\mu_{0}(1+\chi) $
$=4 \pi \times 10^{-7}[1+99] $
$=4 \pi \times 10^{-5}$