1.

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          [MP PET 1995]

A.          \[\frac{F}{K}\]     
B.          \[\frac{FK}{{{\varepsilon }_{0}}}\]  
C.          \[\frac{F}{K{{\varepsilon }_{0}}}\]        
D.          \[\frac{F{{\varepsilon }_{0}}}{K}\]
Answer» B.          \[\frac{FK}{{{\varepsilon }_{0}}}\]  


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