State and explain coulombs law. Do include the case when the charges are placed in dielectrics. Discuss how the unit charge coulomb is defined?
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Explanation:
1) coulomb's law states that electrostatic force between two point charges is
1) directly proportional to product of two charges. 2) universally proportional to square of distance between them ( charges ).
F = k 1/ 4T£°. q/ R2
where 'r' is the distance between two charges.
k is a constant it' s value depends upon the nature of medium for air or vacuum
k= 1/4TT£°
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