According to the figure below, four particles form a square. The charges are ql q4 - q and q2 = q3 = Q. (a)What is Qlg if the net electrostatic force on particles 3 is zero? (b) Is there any value of q that makes the net electrostatic force on each of the four particles zero? Explain

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Coulomb’s Law

Coulomb's law states that the attraction or repulsion force between two charged things is proportional to the product of their charges and inversely proportional to the square of their distance. It has an effect along the line that connects the two-point charges.