Needles N₁, N_2, and N₃ are made of a ferromagnetic, paramagnetic, and diamagnetic substance respectively. A magnet when brought close to them will

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Attract N₁ and N₂ strongly but repel N₃

Attract all three of them

Attract N₁ strongly, but repel N₂ and N₃ weakly

Attract $N_{1}$ strongly, N₂ weakly, and repel N₃ weakly

answer is B.

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Detailed Solution

The ferromagnetic substance has magnetic domains whereas paramagnetic substances have magnetic dipoles which get attracted to a magnetic field. Diamagnetic substances do not have magnetic dipole but in the presence of the external magnetic field due to their orbital motion of electrons these substances are repelled.

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