Question

An infinite long thread carries a charge uniformly spread over its length. It is bent in the form as shown. If the charge per unit length is $\lambda$, the electric field at point $O$ is

• A. $\frac{\lambda }{2\pi {\epsilon }_{0}r}$
• B. $\frac{\lambda }{\sqrt{2}\pi {\epsilon }_{0}R}$
• C. $\frac{\lambda }{2\sqrt{2}\pi {\epsilon }_{0}R}$
• D. Zero

Answer 1

The correct option is C $\frac{\lambda }{2\sqrt{2}\pi {\epsilon }_{0}R}$