1.

Two parallel long smooth conducting rails separated by a distance l=10cm are connected by a movable conducting connector of mass m = 4mg. Terminal of the rails are connected by the resistor R=2Omega & the capacitor C=1muF as shown. A uniform magnetic field B=20T perpendicular to the plane of the rails is switched on. The connector isdragged by a constant force F=10 N. The speed of the connector as function of time if the force F is applied at t=0 is equal to v=5(1-e^(-x xx10^(4)xxt))m//s. Find the value of x.

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ANSWER :25


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