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  4. The magnetic susceptibility of a paramagnetic substance at -73° C is 0.0060, then its value at -173° C will be

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Q. The magnetic susceptibility of a paramagnetic substance at $ -73{}^\circ C $ is $0.0060$, then its value at $ -173{}^\circ C $ will be

ManipalManipal 2007Magnetism and Matter

Solution:

As magnetic susceptibility, $\chi_{m} \propto \frac{1}{T}$, therefore
$\frac{\chi_{2}}{\chi_{1}} =\frac{T_{1}}{T_{2}} $
$\frac{\chi}{0.0060} =\frac{273-73}{273-173}=\frac{200}{100}=2$
$\chi_{2} =2 \times 0.0060=0.0120$