Question

Magnetic susceptibility for a paramagnetic and diamagnetic materials is respectively

• A. small, positive and small, positive
• B. large, positive and small, negative
• C. small, positive and small, negative
• D. large, negative and large, positive

Answer 1

Answer: (C)

The magnetic susceptibility of a magnetic substance is defined as the ratio of intensity of magnetisation (I) to magnetic intensity (H), i.e.
$x=\frac{I}{H}$
For paramagnetic material, $\chi$ is positive and small $(0<\chi<\varepsilon)$, where $\varepsilon$ is small positive number.
For diamagnetic meterial, $\chi$ is negative and small $(-1 \leq \chi \leq 0)$