Physics - Magnetism Question with Solution | TestHub

Magnetic moment,$M=ml$

$\frac{M}{l}=m,$where m is the pole strength. Therefore distance between poles

$= \sqrt{{\left(\frac{l}{2}\right)}^2+{\left(\frac{l}{2}\right)}^2}=\frac{l}{\sqrt{2}}$

So,$M^{\prime }=\frac{ml}{\sqrt{2}}=\frac{M}{\sqrt{2}}$