Question

What is Magnetic Dipole Moment?

Answer 1

Magnetic Dipole Moment : It is defined as the product of strength of either pole $(m)$ and the magnetic length $(2 \vec{l})$ of the magnet. It is denoted by $\vec{M}$.

Magnetic Dipole Moment $=$ strength of either pole $\times$ magnetic length

$\vec{M}=m(2 \vec{l})$

Magnetic dipole moment is a vector quantity and it is directed from south to north pole of the magnet.

The SI unit of magnetic dipole moment is $\mathrm{A} \mathrm{m}^2$.

If a magnet of moment $M$ and pole strength $m$ is cut into two equal parts along its length, then the pole strength of each part is $m / 2$ and the magnetic moment of each part is $M / 2$.

If a magnet of magnetic moment $M$ and pole strength $m$ is cut into two equal halves along perpendicular to its length, then the pole strength of each part is $m$ and magnetic moment of each part is $M / 2$.