A paramagnetic gas consists of atoms each with a dipole moment of `1.5 xx 10^-23 j T^-1`. The temperature of the gas is `27^@C` and its number density is `2xx10^26 m^-3`. What is the maximum magnetisation of the sample possible, when it is placed in an external magnetic field?

A short bar magnet placed with its axis at 30^@ with a uniform external magnetic field of 0.25 T experiences a torque of magnitude equal to 4.5 xx 10^-2 J .What is the magnitude of magnetic moment of the magnet?

A short bar magnet placed with its axis at 30^@ with a unifrom external magnetic field of 0.25 T experience a torque of magnitude equal to 4.5 xx 10^-2 J . What is the magnitude of magnetic moment of the magnet?

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 magnet weighs 75 g and its magnetic moment is 2xx10^-4 A m^2 . If the density of the material of the magnet is 7.5 xx 10^3 kg m^-3 , calculate the intensity of magnetisation.

Assume that each iron atom has a permanent magnetic moment equal to 2 Bohr magneton . The number density of atoms in iron is 8.52 xx 10^28 m^-3 . Find the maximum value of intensity of magnetisation.

Assume that each iron atom has a permanent magnetic moment equal to 2 Bohr magneton . The number density of atoms in iron is 8.52 xx 10^28 m^-3 . Find the maximum value of magnetic induction in an iron bar.

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