Question

For a magnetic material graph between intensity of magnetisation $\left(\overrightarrow{I}\right)$ and magnetic intensity $\left(\overrightarrow{H}\right)$ is as shown in diagram
Then material is

• A. Diamagnetic
• B. Paramagnetic
• C. Feromagnetic
• D. All

Answer 1

The correct option is A Diamagnetic

Solution: For the given material,

${\chi }_m=slopeof$ $I-Hcurve$

and slope of I-H curve is negative.

So, we can conclude that,

${\chi }_m$ is small and -ve.

hence, material is diamagnetic.

The correct opt : A