$A$ magnetizing field of $2 \times 10^3 \, A/m$ produces a magnetic flux density of $8 \pi \, T$ in an iron rod. The relative permeability of the rod will be -

The magnetic moment produced in a substance of mass $5 \ g$ is $6 \times 10^{-7} \ A \cdot m^{2}$. If its density is $5 \ g/cm^{3}$,then the intensity of magnetization in $A/m$ will be:

When a piece of a magnetic substance is placed in a uniform magnetic field,the flux density inside it is four times the flux density away from the piece. The magnetic permeability of the material is

$A$ bar of iron having magnetic moment $2.4 \text{ Am}^2$ weighs $66 \text{ g}$. If the density of the material of the bar is $7700 \text{ kg/m}^3$,the intensity of magnetisation in $\text{Am}^{-1}$ is

Magnetization of the sample is defined as:

The correct relation between total magnetic field $(B)$,magnetic intensity $(H)$,permeability of free space $(\mu_0)$ and susceptibility $(\chi)$ is