Q. The electric intensity outside a charged sphere of radius $R$ at a distance $r(r > R)$ is
A) $\frac{\sigma R^{2}}{\varepsilon_{0}r^{2}}$
B) $\frac{\sigma r^{2}}{\varepsilon_{0}R^{2}}$
C) $\frac{\sigma r}{\varepsilon_{0}R}$
D) $\frac{\sigma R}{\varepsilon_{0}r}$
Explanation
(a) The electric intensity outside a charged sphere.
$E = \frac{\sigma R^{2}}{\varepsilon_{0}r^{2}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.