Question

A certain material has magnetic susceptibility of $+0.007$. Then the material is -

• A. weakly repelled by magnetic field
• B. strongly repelled by magnetic field
• C. weakly attracted by magnetic field
• D. strongly attracted by magnetic field

Answer 1

The correct option is C weakly attracted by magnetic field

Magnetic susceptibility is given by,

$\overrightarrow{I}=\chi \overrightarrow{H}$

Here, $\chi =+0.007$

As, $\chi$ is positive, it means $\overrightarrow{I}$ and $\overrightarrow{H}$ have same directions.

Hence, the material is magnetized in the direction of the applied field, and it will experience a force of attraction.

Also,

$\chi =\frac{I}{H}=0.007$

$\Rightarrow I<<H$

Hence, the force experienced by the material in the magnetic field will have very small magnitude.

Therefore, option $\left(C\right)$ is correct.