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A force \[F\] acts between sodium and chlorine ions of salt (sodium chloride) when put \[1\,cm\] apart in air. The permittivity of air and dielectric constant of water are \[{\varepsilon _0}\] and \[K\] respectively. When a piece of salt is put in water electrical force acting between sodium and chlorine ions \[1\,cm\] apart is

Electrostatics

Question: A force \[F\] acts between sodium and chlorine ions of salt (sodium chloride) when put \[1\,cm\] apart in air. The permittivity of air and dielectric constant of water are \[{\varepsilon _0}\] and \[K\] respectively. When a piece of salt is put in water electrical force acting between sodium and chlorine ions \[1\,cm\] apart is


1) \[\frac{F}{K}\]
2) \[\frac{{FK}}{{{\varepsilon _0}}}\]
3) \[\frac{F}{{K{\varepsilon _0}}}\]
4) \[\frac{{F{\varepsilon _0}}}{K}\]
Solution: Explanation: 1e

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