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A charge + Q is uniformly distributed over a thin ring with radius R. A negative point charge – Q and mass m starts from rest at a point far away from the centre of the ring and moves towards the centre. Find the velocity of this particle at the moment it passes through the centre of the ring.
Draw the figure .See we find the force by whole ring at a point where distance of point is x from the center.Center is our origin here.|Work done|=gain in KEArun KumarIIT DelhiAskiitians Faculty
thank uuuuuuu
how did dx come ????? pls ans
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