Write expression of Coulombian force acting between two charges kept in medium.
$ + 2\,C$ and $ + 6\,C$ two charges are repelling each other with a force of $12\,N$. If each charge is given $ - 2\,C$ of charge, then the value of the force will be
Three point charges are placed at the corners of an equilateral triangle. Assuming only electrostatic forces are acting
Two charges placed in air repel each other by a force of ${10^{ - 4}}\,N$. When oil is introduced between the charges, the force becomes $2.5 \times {10^{ - 5}}\,N$. The dielectric constant of oil is
Two charged spheres separated at a distance $d$ exert a force $F$ on each other. If they are immersed in a liquid of dielectric constant $2$, then what is the force (if all conditions are same)
When air is replaced by a dielectric medium of constant $k$, the maximum force of attraction between two charges separated by a distance