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Two positive charges of magnitude q arc placed at the ends of a side 1 of a square of side 2a.

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Two positive charges of magnitude q arc placed at the ends of a side 1 of a square of side 2a. Two negative charges of the same magnitude are kept at the other corners. Starting from rest, if a charge Q moves from the middle of side 1 to the centre of square, its kinetic energy at the centre of square is

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Correct Option (a)

Explanation:

Initial potential energy of the system

Final potential energy of the system

Uf  = 0

By conservation of energy,

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