Question

Three 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
(а) attract N1 strongly, but repel N2 and N3 weakly.
(b) attract all three of them.
(c) attract N1 and N2 strongly but repel N3.
(d) attract N1 strongly, N2 weakly and repel N3 weakly.

Answer 1

Answer:

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.

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