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If two identical bar magnets, each of length l, pole strength m, and magnetic moment M are placed perpendicular to each other with their unlike poles in contact, the magnetic moment of the combination is :

\[\begin {array} {1 1} (a)\;\frac{M}{\sqrt 2} & \quad (b)\;lm(\sqrt 2) \\ (c)\;2 lm (\sqrt 2) & \quad (d)\;2M \end {array}\]
Can you answer this question?

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$ (B)\;lm(\sqrt 2)$
Hence B is the correct answer.
answered Mar 24, 2014 by meena.p

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