Four small spheres carrying `+(5)/(3),+(10)/(3),+(5)/(3)` and `-(5)/(3)`nC are placed in order at the angular points of a sqare ABCD of 10 cm sides. C
Four small spheres carrying `+(5)/(3),+(10)/(3),+(5)/(3)` and `-(5)/(3)`nC are placed in order at the angular points of a sqare ABCD of 10 cm sides. Calculate the force on a charge of `+(2)/(3)`nC at the intersection O of the diagonal
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