Question

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

• A. Attract all three of them
• B. Attract $N_1$ and $N_2$ strongly but repel $N_3$
• C. Attract $N_1$ strongly, $N_2$ weakly and repel $N_3$ weakly
• D. Attract $N_1$ strongly, but repel $N_2$ and $N_3$ weakly

Answer 1

The correct option is C Attract $N_1$ strongly, $N_2$ weakly and repel $N_3$ weakly

Ferromagnetic materials are strongly attracted in an external magnetic field.

Paramagnetic suubstances are feebly attracted in an external magnetic field.

However, diamagnetic substances are repelled in an external magnetic field.

Magnet will atract $N_1$ strongly, $N_2$ weakly and repel $N_3$ weakly.

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

Magnet will atract $N_1$ strongly, $N_2$ weakly and repel $N_3$ weakly.