Question

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

• A. 0
• B. $\frac{F{\epsilon }_0}{K}$
• C. $\frac{F}{K}$
• D. $\frac{FK}{{\epsilon }_0}$

Answer 1

Answer: (C)