The electric field at a point at a distance (r) due to a point charge is
proportional to.
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"Coulomb’s law is a quantitative statement about the force between two point charges. When the linear size of charged bodies are much smaller than the distance separating them, the size of may be ignored and the charged bodies are treated as point charges. Coulomb measured the force between two point charges and found that it varied inversely as the square of the distance between the charges and was directly proportional to the product of the magnitude of the two charges and acted along the line joining the two charges. Thus, if two point charges q_1, q_2 are separated by a distance r in vacuum, the magnitude of the force (F) between them is given by : (PLEASE FIND THE CALCULATION ATTACHED)"
We can also define electric field as E = F/q
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