-->

Electrostatic Potential And Capacitance

Question

A semi-circular arc of radius ‘a’ is charged uniformly and the charge per unit lengths is λ. The electric field at the centre is
$\frac{λ}{2 {πε}_{0} a^{2}}$
$\frac{λ}{4 {πε}_{0} a}$
$\frac{λ^{2}}{2 {πε}_{0} a}$
$\frac{λ}{2 {πε}_{0} a}$

Solution

\frac{λ}{2 {πε}_{0} a}