Two similar bar magnets P and Q,each of magne | vedclass

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(C) Let the original pole strength be $m$,length be $L$,and magnetic moment be $M = m 	imes L$.Case $1$: Magnet $P$ is cut along its axial line (long

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Magnetic moment $\frac{M}{2}$

Vedclass · Answer

(C) Let the original pole strength be $m$,length be $L$,and magnetic moment be $M = m 	imes L$.Case $1$: Magnet $P$ is cut along its axial line (longitudinally).Each piece has length $L' = L$ and pole strength $m' = \frac{m}{2}$.The new magnetic moment is $M' = m' 	imes L' = \frac{m}{2} 	imes L = \frac{M}{2}$.Case $2$: Magnet $Q$ is cut along its equatorial line (transversely).Each piece has length $L' = \frac{L}{2}$ and pole strength $m' = m$.The new magnetic moment is $M' = m' 	imes L' = m 	imes \frac{L}{2} = \frac{M}{2}$.Thus,all four pieces obtained have a magnetic moment of $\frac{M}{2}$.

Two similar bar magnets $P$ and $Q$,each of magnetic moment $M$,are taken. If $P$ is cut along its axial line and $Q$ is cut along its equatorial line,all the four pieces obtained have:

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