For which of the following substances, the magnetic susceptibility is independent of temperature?

Electromagnets are made of soft iron because soft iron has

Consider the following two statements $A$ and $B$ and identify the correct choice in the given answers.
$A$. Paramagnetism is explained by domain theory.
$B$. Susceptibility of a diamagnetic substance is independent of temperature.

If $\chi$ is the magnetic susceptibility and $\mu_{r}$ is the relative permeability of a ferromagnetic substance, then:

The material of a permanent magnet has:

Which of the following is desirable for making permanent magnets?