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Coulomb’s law is the basic and the most important law of electricity. The law gives the force of attraction that exists between two charged particles.
Coulomb’s law states that – “the force of attraction between two charges is directly proportional to the product of their charges and is inversely proportional to the square of the distance between them.”
Consider two point charges q2 coulombs and q2 coulombs are at a distance of ‘r’ meters from each other, as shown in the figure. Then if ‘F’ is the force of attraction between them, thenF= kq1q2/r,
Besides giving the force that exists between two stationary charges, Coulomb’s law has significance in quantum physics too. It talks about various types of forces that exist in an atom such as:
In other words, most forces that we experience in our day to day life, that are not gravitational in nature, are electrical in nature and are governed by Coulomb’s law.
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