Given below are two statements:Statement-I: S | vedclass

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$(A)$ According to Curie's law, the magnetic susceptibility $\chi$ of paramagnetic substances is inversely proportional to the absolute temperature $T

Vedclass · Accepted Answer

Both statement-$I$ and statement-$II$ are true.

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$(A)$ According to Curie's law, the magnetic susceptibility $\chi$ of paramagnetic substances is inversely proportional to the absolute temperature $T$, given by $\chi = \frac{C}{T}$.For ferromagnetic substances, the susceptibility follows the Curie-Weiss law: $\chi = \frac{C}{T - T_C}$, where $T_C$ is the Curie temperature. As $T$ decreases towards $T_C$, the susceptibility increases. Thus, Statement-$I$ is true.Diamagnetism arises due to the orbital motion of electrons. When an external magnetic field is applied, it induces a change in the orbital motion, creating a magnetic moment that opposes the applied field (Lenz's law at the atomic level). Thus, Statement-$II$ is true.Therefore, both statements are true. The correct option is $(A)$.

List-$I$ (Material)	List-$II$ (Susceptibility $(\chi)$)
$A$. Diamagnetic	$I$. $\chi=0$
$B$. Ferromagnetic	$II$. $0 > \chi \geq -1$
$C$. Paramagnetic	$III$. $\chi >> 1$
$D$. Non-magnetic	$IV$. $0 < \chi < \varepsilon$ (a small positive number)

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