The magnetic susceptibility of a ferromagnetic substance is

The dimensions $[MLT^{-2}A^{-2}]$ belong to:

If the magnetizing field on a ferromagnetic material is increased,its permeability

$A$ bar magnet has length $4 \text{ cm}$,cross-sectional area $2 \text{ cm}^2$ and magnetic moment $6 \text{ Am}^2$. The intensity of magnetisation of the bar magnet is

$A$ material of $0.25 \ cm^2$ cross-sectional area is placed in a magnetic field of strength $(H) 1000 \ Am^{-1}$. Then,the magnetic flux produced is (Susceptibility of material is $313$) (Permeability of free space,$\mu_0 = 4 \pi \times 10^{-7} \ Hm^{-1}$)

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