The ratio of the force between two charges in air and that in a medium of dielectric constant K is
A. K : 1
B. 1 : K
C. K2 : 1
D. 1 : K2
Answer:A
The ratio of the force between two charges in air and that in a medium of dielectric constant K is
A. K : 1 B. 1 : K C. K2 : 1 D. 1 : K2