Physics - Electrostatics Question with Solution | TestHub

Let the potential at centre of arc due to charge Q, -2Q and 3Q is ${\mathrm{V}}_1,{\mathrm{V}}_2$ and ${\mathrm{V}}_3$ respectively. The net potential at centre is algebraic sum of potential due to all the charges. $\mathrm{V}={\mathrm{V}}_1+{\mathrm{V}}_2+{\mathrm{V}}_3$