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

\[\begin {array} {1 1} (1)\;\frac{2M}{\pi} & \quad (2)\;2M \\ (3)\;\frac{M}{\pi} & \quad (4)\;0(zero) \end {array}\]
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answered Nov 7, 2013 by pady_1

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