Draw diagrams to depict the behaviour of magnetic field lines near a bar of mercury, cooled to a very low temperature (4.2K)

Draw diagrams to depict the behaviour of magnetic field lines near a bar of copper

Draw diagrams to depict the behaviour of magnetic field lines near a bar of aluminium

Two similar bars made from two different materials P and Q are placed one by one in a non-uniform magnetic field. It is observed that bar P tends to move from the weak to the strong field region and d. What is the nature of the magnetic materials for making these two bars? Show with the help of a diagram, the behaviour of the field lines due to an external magneic field near each of these two bars.

A sample of paramagnetic salt contains 2.0 xx 10^24 atomic dipoles each of dipole moment 1.5 xx 10^-23 JT^-1 . The sample is placed under a homogeneous magnetic field of 0.64 T, and cooled to a temperature of 4.2 K. The degree of magnetic saturation achieved is equal to 15%. What is the total dipole moment of the sample for a magnetic field of 0.98 T and a temperature of 2.8 K? (Assume Curie’s law)

A paramagnetic sample shows a net magnetism of 8Am^-1 when placed in an external magnetic field of 0.6 T at a temperature of 4K. When the same sample is placed in the external magnetic field of 0.2 T at a temperature of 16 K, the magnetisation will be

A short bar magnet has a magnetic moment of 0.2 JT(-1) . Calculate the magnitude of the magnetic field produced by the magnet at a distance of 8 cm from the centre of the magnet on the equitorial line of the magnet.