With what force do two charges 9nC and 4nC interact, located at a distance of 6 cm from each other?

univerkov | February 10, 2021 | education

Given:
q1 = 9nC = 9 * 10 ^ (- 9) C
q1 = 4nC = 4 * 10 ^ (- 9) C
r = 6cm = 0.06m
According to Coulomb’s law
F = k * (q1 * q2) / (r ^ 2),
where k = 9 * 10 ^ 9 H * (m ^ 2) / (Cl ^ 2) in SI
F = [9 * 10 ^ 9 * 9 * 10 ^ (- 9) * 4 * 10 ^ (- 9)] / 0.0036
F = 9 * 10 ^ (- 5) H = 0.09mN

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