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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2005
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A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a r permanent magnet such that B is in place of the coil. If due to a current i in the triangle a torque ? acts on it, the side l of the triangle is-


( A ) 23[τBi]
( B ) 23[τBi]12
( C ) 2[τ3Bi]12
( D ) 13τBi
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