A charge +Q is uniformly distributed over a thin ring of the radius R. The velocity of an electron at the moment when it passes through the centre O of the ring, if the electron was initially at far away on the axis of the ring is (m=mass of electron, `K=1/(4pi epsi_(0))`)A. `sqrt(((2KQe)/(mR)))`B. `sqrt(((Kqe)/m))`C. `sqrt(((Kme)/(QR)))`D. `sqrt(((Kqe)/(mR)))`

A charge +Q is uniformly distributed over a thin ring of the radius R.

1.	A charge +Q is uniformly distributed over a thin ring of the radius R. The velocity of an electron at the moment when it passes through the centre O of the ring, if the electron was initially at far away on the axis of the ring is (m=mass of electron, `K=1/(4pi epsi_(0))`)A. `sqrt(((2KQe)/(mR)))`B. `sqrt(((Kqe)/m))`C. `sqrt(((Kme)/(QR)))`D. `sqrt(((Kqe)/(mR)))`
Answer» Correct Answer - A

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