A magnet of magnetic moment M and pole streng | vedclass

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(B) The magnetic moment of a magnet is given by $M = m 	imes l$,where $m$ is the pole strength and $l$ is the magnetic length.Case $1$: If the magnet

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$M/2$

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(B) The magnetic moment of a magnet is given by $M = m 	imes l$,where $m$ is the pole strength and $l$ is the magnetic length.Case $1$: If the magnet is cut along its axis (longitudinally),the new pole strength becomes $m' = m/2$ and the length remains $l' = l$.Therefore,the new magnetic moment $M' = m' 	imes l' = (m/2) 	imes l = M/2$.Case $2$: If the magnet is cut perpendicular to its axis,the pole strength remains $m' = m$ and the new length becomes $l' = l/2$.Therefore,the new magnetic moment $M' = m' 	imes l' = m 	imes (l/2) = M/2$.In both cases,the magnetic moment of each part is $M/2$.

$A$ magnet of magnetic moment $M$ and pole strength $m$ is divided into two equal parts. The magnetic moment of each part will be:

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