A square wire loop of side length L is made out of a uniform thin conducting wire The resistance of the loop is R The loop is

Question

A square wire loop of side length L is made out of a uniform thin conducting wire The resistance of the loop is R The loop is placed in the X Y plane with its sides parallel to the coordinate axes and its centre at the origin The loop is pivoted to rotate without friction about the Y axis A uniform magnetic field of magnitude Bexists the Z direction At t 0 the loop is given an angular impulse Jabout the Y axis If the loop rotates by an angle 180 before it comes to rest and J X BI R then X is

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