Charge q1 = 7 µC, charge q2 = 3 µC, d = 10 cm 91 If charge q3 = 7.5 µC is added at point P1, what is the magnitude of the net electrostatic force in Newtons that it would feel from the presence of q, and q2? d 2 P1 (no charge here) Answer: d 2 92

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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.