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developed in the 1780s by French physicist Charles Augustin de Coulomb The magnitude of the electrostatic force between two point electric charges is directly proportional to the product of the magnitudes of each charge and inversely proportional to the square of the distance between the charges. F = k q1q2 \ d2 As F is electric force

k is coulomb's constant = 9*10^9 Nm^2\C^2

q1 and q2 are the charges measured in coulombs d is the distance between them measured in meters

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