The magnetised wire of moment 'M' and length 'l' is bent in the form of semicircle of rdius 'r'. then its magnetic moment is

Question

\[\begin {array} {1 1} (1)\;\frac{2M}{\pi} & \quad (2)\;2M \\ (3)\;\frac{M}{\pi} & \quad (4)\;0(zero) \end {array}\]

Comments

Solve this problem