Q.
The variation of intensity of magnetization $(I)$ with respect to the magnetizing field $(H)$ in a diamagnetic substance is described by the graph in figure.
A) $OD$
B) $OC$
C) $OB$
D) $OA$
Explanation
(b) For a dia-magnetic substance, $I$ is negative and $- I \propto H.$ Therefore, the variation is represented by $OC\ or\ OD$. As magnetisation is small, $OC$ is better choice.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.