diagonal squared = 2L2
F12 = kq2/L2
F23 = kq2/L2
F24 = kq2/(2L2)
Four equal positive point charges, each of charge 5.7 µC , are at the corners of a square of side 9.2 cm.
What charge should be placed at the center of the square so that all charges are at equilibrium?
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