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Q.
If $\mu_0$ is absolute permeability of vacuum and $\mu_{ r }$ is relative magnetic permeability of another medium, then permeability $\mu$ of the medium is
Magnetism and Matter
Solution:
Relative magnetic permeability
$\mu_r=\frac{\mu}{\mu_0} \Rightarrow \mu=\mu_0 \times \mu_r$