Question

Needles $N_1$, $N_2$ and $N_3$ are made up of ferromagnetic, paramagnetic and diamagnetic material, respectively. A magnet, when brought close to them, will :

$\left(I\right)$. Attract $N_1$ strongly, attract $N_2$ weakly and repel $N_3$.

$\left(II\right)$. Attract $N_1$ more strongly than $N_2$.

$\left(III\right)$. Attract $N_1$ and $N_2$ strongly but repel $N_3$.

$\left(IV\right)$. Attract all of them.

• A. $I,II$
• B. $II,III$
• C. $I,III$
• D. $IV$

Answer 1

The correct option is A $I,II$

$N_1\to$ Ferromagnetic material $\to$ It will be strongly attracted by the magnet.

$N_2\to$ Paramagnetic material $\to$ It will be weakly attracted by the magnet.

$N_3\to$ Diamagnetic material $\to$ It will be repelled by the magnet.

Therefore, statements $I$ and $II$ are correct.

Hence, option $\left(A\right)$ is the correct answer.