Curie temperature is the temperature above which

$A$ paramagnetic material has $10^{28} \text{ atoms/m}^3$. Its magnetic susceptibility at temperature $350 \text{ K}$ is $2.8 \times 10^{-4}$. Its susceptibility at $300 \text{ K}$ is

$A$ 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:

Which of the following curves represents the variation of magnetic moment $(M)$ with temperature $(T)$ for a ferromagnetic material?

$A$ superconductor exhibits perfect

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