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Coulomb is the SI unit of electric charge . electron in 1 Coulomb is 6×10*18e- .
1 C= 1A × 1S.
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The electric force between two point charges is directly proportional to the product of the two charges and inversely proportional to the square of the distance between them. The force acts along the line joining the two charges and its value depends on the nature of the intervening medium.

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