Q110 / 150 · MHT CET 2024 (03 May Shift 2) · Physics
The magnetic susceptibility of the material of a rod is 599. The absolute permeability of the material of the rod will be $\left[\mu_0=4 \pi \times 10^{-7}\right.$ SI unit $]$.
- A$2 \pi \times 10^{-4}$
- Correct answerB$2.4 \pi \times 10^{-4}$
- C$4 \pi \times 10^{-4}$
- D$4.8 \pi \times 10^{-4}$
Solution
We know,
$\mu=\mu_{\mathrm{r}} \mu_0=(1+\chi)$
... $\mu_{\mathrm{r}}$ is relative permeability
Substituting the given values into the above equation, we get
$\begin{aligned}
\mu_{\mathrm{r}} & =(1+\chi) \mu_{\mathrm{o}}=(1+599)\left(4 \pi \times 10^{-7}\right) \\
\because & =2.4 \pi \times 10^{-4}
\end{aligned}$
Hence, the correct answer is option: 'B'.