Two parallel long smooth conducting rails separated by a distance ‘l ’ are connected by a movable conducting connector of mass m. Terminals of the rails are connected by the resistor R and a capacitor C (other end). A uniform magnetic field B perpendicular to the plane of rails is switched on (in to the paper). The connector is dragged by a force F. find the speed of the connector as function of time if the force is applied at t = 0. also find the terminal velocity of the connector. (Ans: v = FR/B2l2 (1- e^[- B2l2t / R(m+ B2l2 C])