A paramagnetic salt has a magnetic moment of$5.0 \mathrm{A} {\mathrm{m}}^2$ at a temperature of $4 \mathrm{K}$ in a magnetic field of $1.0 \mathrm{T}.$ Find its magnetic moment at a temperature of $3 \mathrm{K}$ in a magnetic field of $1.5 \mathrm{T}.$

The magnetic field induction in a material placed in a magnetising field of $2000{\mathrm{Am}}^{-1}$ is $1.0 \mathrm{N} {\mathrm{A}}^{-1} {\mathrm{m}}^{-1}$. Find magnetic permeability.

The magnetic field induction in a material placed in a magnetising field of $2000{\mathrm{Am}}^{-1}$ is $1.0 \mathrm{N} {\mathrm{A}}^{-1} {\mathrm{m}}^{-1}$. Find relative permeability.

The magnetic field induction in a material placed in a magnetising field of $2000{\mathrm{Am}}^{-1}$ is $1.0 \mathrm{N} {\mathrm{A}}^{-1} {\mathrm{m}}^{-1}$. Find magnetic susceptibility and  ${\mu }_0=4\pi \times {10}^{-7} \mathrm{N} {\mathrm{A}}^{-2}$. 

The magnetic field induction in a material placed in a magnetising field of $2000{\mathrm{Am}}^{-1}$ is $1.0 \mathrm{N} {\mathrm{A}}^{-1} {\mathrm{m}}^{-1}$. Find intensity of magnetisation for the material.