Physics - Electrostatics Question with Solution | TestHub

Given: Distance between two charges $=d$ and dielectric constant $(k)=2$. Force between two charged spheres $(F)=\frac{1}{4\pi {\epsilon }_0}\times \frac{q_1{q}_2}{r_2}$, where ${\epsilon }_0$ is permitivity of free space. Force for a medium with dielectric constant $k$, $F^{\prime }=\frac{1}{k}\times \frac{1}{4\pi {\epsilon }_0}\times \frac{q_1{q}_2}{r^2}=\frac{F}{k}=\frac{F}{2}$