Choose the correct statement regarding magnetism.

There are four light-weight-rod samples; A, B, C, D separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted:

Which one of the following is true?

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by µ_d, µ_p, and µ_f respectively, then:

1. µ_p = 0 and µ_f ≠ 0

2. µ_d ≠ 0 and µ_p = 0

3. µ_d ≠ 0 and µ_f ≠ 0

4. µ_d = 0 and µ_p ≠ 0

The material which is used to make permanent magnet has:

The variation of the intensity of magnetisation (I) with respect to the magnetising field (H) in a diamagnetic substance is described by the graph:

A frog can be levitated in a magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as:

The variation of magnetic susceptibility $\left(\chi \right)$ with temperature for a diamagnetic substance is best represented by:

1.		2.
3.		4.