The relative permeability of iron is $5500$. What will be its magnetic susceptibility?

The $\chi - 1/T$ graph for an alloy of paramagnetic nature is shown in the figure. The Curie constant is,then....$K$.

What is the magnetic susceptibility of a medium if its relative permeability is $0.85$?

The magnetic susceptibility of a paramagnetic substance at $-123^{\circ} C$ is $0.0060$. What will be its value at $-173^{\circ} C$?

Obtain the relation between magnetisation $\vec{M}$ and magnetic intensity $\vec{H}$ for a solenoid.

$A$ rod of ferromagnetic material with dimensions $10 \, cm \times 0.5 \, cm \times 0.2 \, cm$ is placed in a magnetic field of strength $0.5 \times 10^4 \, A/m$. As a result,a magnetic moment of $5 \, A \cdot m^2$ is produced in the rod. The value of the total magnetic induction will be (in $Tesla$):