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

Answer 1

Answer:

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Answer 2

Answer:

aBehaviour in a non- uniform magnetic field -

These are strongly attracted in an external magnetic field (in ferromagnetic substance)

Behaviour in a non-uniform magnetic field -

These are feebly attracted in an external magnetic field (in paramagnetic substance)

Behaviour in a non uniform magnetic field -

These are repelled in an external magnetic field. (In diamagnetic substance)

Magnet will attract N1 strongly, N2 weakly and repel N3 weakly .

Option 1)

attract all three of them

Incorrect

Option 2)

attract N1 and N2 strongly but repel N3

Incorrect

Option 3)

attract N1 strongly, N2 weakly and repel N3 weakly

Correct

Option 4)

attract N1 strongly, but repel N2 and N3 weakly.

Incorrect

Explanation:

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