Q. Charge $Q$ is placed on each of $(n - 1)$ corners of a polygon of $n$ sides. The distance of centre of the polygon from each corners is $'r'$, then electric field at centre is
A) $\frac{1}{4\pi\varepsilon_{0}}\frac{Q}{r^{2}}$
B) $\frac{(n - 1)}{4\pi\varepsilon_{0}}\frac{Q}{r^{2}}$
C) $\frac{n}{(n - 1)}\frac{1}{4\pi\varepsilon_{0}}\frac{Q}{r^{2}}$
D) Zero
Explanation
(a) Electric field $E = \frac{1}{4\pi\varepsilon_{0}} \times \frac{Q}{r^{2}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.