"The force that one particle exerts on another particle is directly proportional to the product of their charges and inversely proportional to the square of their separation."
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The force is directed from one charge to the other where,
q1 is the net charge of particle 1.
q2 is the net charge of particle 2.
d is the separation of the particles.
The unit of the electric charge is called the Coulomb (C).
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