The unit of magnetic moment is

$A$ bar magnet $AB$ is cut into two equal parts as shown in the figure. One part is kept over the other so that the pole $C_{2}$ is above $C_{1}$. If $M$ is the magnetic moment of the original magnet,the magnetic moment of the combination so formed is

$A$ bar magnet having magnetic moment $M$ is bent as an arc. Its magnetic moment

If $L$ is the length of a bar magnet,then the separation between the two poles is nearly

The magnetic lines of force inside a bar magnet

$A$ permanent magnet: