Q. The magnetic susceptibility of a paramagnetic substance at $- 73{^\circ}$ C is 0.0060, then its value at$- 173{^\circ}$C will be
A) 0.0030
B) 0.0120
C) 0.0180
D) 0.0045
Explanation
(b) $X_{m} \propto \frac{1}{T},$ Therefore,
$\ \ \ \ \ \ \ \ \ \ \ \frac{X_{2}}{X_{1}} = \frac{T_{1}}{T_{2}}$
$\ \ \frac{X_{2}}{0.0060} = \frac{273 - 73}{273 - 173} = \frac{200}{100} = 2$
Or $X_{2} = 2 \times 0.0060 = 0.0120$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.