Doubt: pls solve this Chapter: Magnetism and Matter - Subject: Physics - Course: NEET Course

pls solve this

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$I = \frac{π}{3} x r r = \frac{3 l}{π} therefore, New magnetic moment M' = mxr = mx \frac{3 l}{π} = \frac{3}{π} . ml = \frac{3 M}{π}$