Q.
Find the force in $N$ experienced by the semicircular rod of radius $R$ charged with a charge $q$, placed as shown in figure. The line of charge with linear charge density $\lambda$ is passing through its centre and perpendicular to the plane of $\operatorname{rod}\left( q =2 \pi^{2} \varepsilon_{0} c , R =1\right.$ metre, $\left.\lambda=2 \,C / m \right)$.
Electrostatic Potential and Capacitance
Solution: