# on putting salt [NaCl] in air a force F acts between sodium and chlorine ions at a distance of 1cm from each other.The permitivity of air and dielectric constant of water are Eo and K respectively. When a piece of salt is placed in water then the force between Na and Cl ions placed at a distance of 1 cm is?

Arun Kumar IIT Delhi
askIITians Faculty 256 Points
8 years ago
$F=k/e_{0} \\=>F_2=k/e_w \\=>F_2=F*e_0/e_w$
Thanks & Regards
Arun Kumar
IIT Delhi