JEE Advanced 2020 Full Test 7 Paper 1

The figure shows a long fixed wire AB carrying constant current I Another wire XY parallel to AB of mass per unit length λ is kept at a distance r from wire AB connected to a capacitor of capacitance C by flexible light wires through a switch. The capacitor is initially charged to voltage E0. The switch is closed at t=0 and the circuit has a negligible. The velocity of the wire XY, just after closing the switch will be