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Question: Answered & Verified by Expert
The relative permeability of iron is 2000 . Its absolute permeability in SI unit will be $\left(\frac{\mu_0}{4 \pi}=10^{-7}\right.$ SI unit $)$
PhysicsMagnetic Properties of MatterMHT CETMHT CET 2021 (22 Sep Shift 2)
Options:
  • A $8 \pi \times 10^{-7}$
  • B $4 \pi \times 10^{-5}$
  • C $8 \pi \times 10^{-4}$
  • D $\frac{500}{\pi} \times 10^{-7}$
Solution:
1884 Upvotes Verified Answer
The correct answer is: $8 \pi \times 10^{-4}$
$\begin{aligned} & \mu=\mu_{\mathrm{r}} \mu_0 \\ & =2000 \times 4 \pi \times 10^{-7} \\ & =8 \pi \times 10^{-4} \text { SI unit }\end{aligned}$

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