Q. Susceptibility of $Mg$ at $300\ K$ is $1.2 \times 10^{- 5}$. The temperature at which susceptibility will be $1.8 \times 10^{- 5}$ is

A) 450 $K$
B) 200 $K$
C) 375 $K$
D) None of these
Explanation

(b) $\chi \propto \frac{1}{T}$
$\therefore\chi_{1}T_{1} = \chi_{2}T_{2}$
Hence $T_{2} = \frac{1.2 \times 10^{- 5} \times 300}{1.8 \times 10^{- 5}} = 200\ K$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.