State coulomb's law. Write down the mathematical expression for it.
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Coulomb's law states the magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them.
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Coulomb's law state the magnitude of electrostatic charges of attraction and repulsion between two point charges.
Force is directly proportional to the product of two point charges and inversely proportional to the square of distance between them
Mathematically,
F = Kq1q2/ r²
where K = 9 × 10^9
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