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A wire of mass m& length l can slide freely on a pair of parallel smooth horizontal rails. A magnetic field B exist in the region in the direction perpendicular to the plane of the rails. The rails are connected at left end by a capacitor of capacity C. At t = 0, wire is given a velocity v₀ towards right side. Then:

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Wire stops finally

Wire will oscillate

Wire will move with constant velocity after sufficient time.

Final K.E. of the rod must be equal to the energy stored in the capacitor.

answer is C.

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Detailed Solution

rod will move with a constant velocity when the force on conductor will be equal to zero. That is when capacitor begins to act as an open circuit

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