Magnetic permeability is maximum for

The magnetic susceptibility of a paramagnetic material is $1.0 \times 10^{-5}$ at $27^{\circ} C$ temperature. Then at what temperature its magnetic susceptibility would be $1.5 \times 10^{-5}$ (in $^{\circ} C$)?

What is the Meissner effect? Explain.

What is a paramagnetic substance? If a small bar of a paramagnetic substance is placed in a non-uniform magnetic field,in which direction does it move?

If $M_z$ is the magnetization of a paramagnetic sample,$B$ is the external magnetic field,$T$ is the absolute temperature,and $C$ is the Curie constant,then according to Curie's law in magnetism,the correct relation is:

Materials suitable for permanent magnets must have which of the following properties?