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Four charge +2q, - 2q,-3q and +3q are k...

Four charge `+2q, - 2q,-3q` and `+3q` are kept in the comers of a square of side . The total field at the centre of `k ((nq)/(a^(2))`, find `n.(K = (1)/(4 pi epsi_(0)), "take" sqrt(2) = 1.414)`.

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