The relative permeability is represented by m | vedclass

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(D) For a paramagnetic substance,the material is weakly attracted by an external magnetic field.$1$. Magnetic susceptibility $\chi$ is defined by the

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$\mu_r > 1, \chi > 0$

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(D) For a paramagnetic substance,the material is weakly attracted by an external magnetic field.$1$. Magnetic susceptibility $\chi$ is defined by the relation $M = \chi H$. For paramagnetic materials,the magnetization $M$ is in the same direction as the applied field $H$,which implies $\chi > 0$.$2$. The relative permeability $\mu_r$ is related to susceptibility by the formula $\mu_r = 1 + \chi$.$3$. Since $\chi > 0$ for paramagnetic substances,it follows that $\mu_r = 1 + \chi > 1$.Therefore,for a paramagnetic substance,$\mu_r > 1$ and $\chi > 0$.

The relative permeability is represented by $\mu_r$ and the susceptibility is denoted by $\chi$ for a magnetic substance. Then for a paramagnetic substance:

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