Question

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

• A. ${\mu }_0{\mu }_r$
• B. ${\mu }_0/{\mu }_r$
• C. ${\mu }_r/{\mu }_0$
• D. $I/{\mu }_0{\mu }_r$

Answer 1

The correct option is A ${\mu }_0{\mu }_r$

$\text{If}{\mu }_0\text{represents the permeability of free space and}\mu$$\text{represents the permeability of a particular substance,}$

$\text{then the relative permeability}{\mu }_r\text{of that substance is given by:}$

${\mu }_r=\frac{\mu }{{\mu }_0}$

$\Rightarrow \mu ={\mu }_0{\mu }_r$