A bar magnet having pole strength q_m and mag | vedclass

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Question

(A) When a bar magnet is cut into two equal parts along its length,the cross-sectional area remains the same,so the pole strength $q_m$ remains unchan

Vedclass · Accepted Answer

$q_m, \frac{m}{2}$

Vedclass · Answer

(A) When a bar magnet is cut into two equal parts along its length,the cross-sectional area remains the same,so the pole strength $q_m$ remains unchanged.However,the length of each new piece becomes $l' = \frac{l}{2}$.The magnetic moment is defined as $m = q_m 	imes l$.For the new pieces,the magnetic moment $m' = q_m 	imes \frac{l}{2} = \frac{m}{2}$.Therefore,the new pole strength is $q_m$ and the new magnetic moment is $\frac{m}{2}$.

$A$ bar magnet having pole strength $q_m$ and magnetic moment $m$ is divided into two equal parts along its length. The new pole strength is . . . . . . and the magnetic moment is . . . . . . respectively.

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