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 an electron was initially at rest at a point A which is very far always from the centre and on the axis of the ring is:

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 an electron was initially at rest at a point A which is very far always from the centre and on the axis of the ring is:
Answer» `SQRT(((2KQe)/(MR)))` `sqrt(((KQe)/(m)))` `sqrt(((KME)/(QR)))` `sqrt(((KQe)/(mR)))` ANSWER :A

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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 an electron was initially at rest at a point A which is very far always from the centre and on the axis of the ring is:

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