Physics - Magnetism Question with Solution | TestHub

On bending the magnet, the angle between two parts of the magnet is expressed in diagram belowNow, the minimum distance between the ends $P$ and $R$ $\begin{array}{rl}& =L\sin 30^{\circ }+L\sin 30^{\circ }\\ & =2L\sin 30^{\circ }=2L\sin 30^{\circ }\\ & =2L\times \frac{1}{2}=L\end{array}$