Question

The following figure shows the variation of intensity of magnetisation $I$ versus the applied magnetic field intensity $H$ , for two magnetic materials $\text{A}$ and $\text{B}$

Which of the material have a larger susceptibility for a given field at constant temperature?

• A. Material $B$
• B. Material $B$ and Material $A$ have the same susceptibility
• C. Material $A$
• D. None of these

Answer 1

Answer: (A)

Material $A$ is paramagnetic and Material $B$ is ferromagnetic.
The susceptibility of material $B$ is larger than $A$ at given magnetic field because ferromagnetic material gets strongly magnetised and hence produces a larger intensity of magnetization in comparison to paramagnetic substance, therefore it is strongly magnetised.