Substances in which the magnetic moment of a single atom is not zero are known as:

$A$ thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on,the diamagnetic rod is pushed up,out of the horizontal magnetic field. Hence,the rod gains gravitational potential energy. The work required to do this comes from:

The product of magnetic susceptibility $(\chi)$ and absolute temperature $(T)$ is constant for a

Given below are two statements:
Statement-$I$: Susceptibilities of paramagnetic and ferromagnetic substances increase with decrease in temperature.
Statement-$II$: Diamagnetism is a result of orbital motions of electrons developing magnetic moments opposite to the applied magnetic field.
Choose the $CORRECT$ answer from the options given below:

The relative permeability is represented by $\mu_r$ and the susceptibility is denoted by $\chi$ for a magnetic substance. Then for a paramagnetic substance:

$A$ small bar of diamagnetic substance is placed in a non-uniform magnetic field. In which direction does it move? Explain.