Question

Needles N₁, N₂ and N₃ are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet when brought close to them will

(a) Attract N₁ strongly, N₂ weakly and repel N₃ weakly

(b) Attract N₁ strongly, but repel N₂ and N₃ weakly

(c) Attract all three of them

(d) Attract N₁ and N₂ strongly but repel N₂

Answer 1

 The correct option (a) Attract N₁ strongly, N₂ weakly and repel N₃ weakly

Explanation:

Ferromagnetic substance magnetizes strongly in the direction of magnetic field N₁ is made up of this  material paramagnetic substance magnetizes weakly in the direction of magnetic field. N₂ is made of this material.

Diamagnetic substance magnetizes weakly in the opposite direction of magnetic field. N₃ is made of this material.

∴ Magnet will attack N₁ strongly, N₂ weakly and it will repel N₃ weakly.