Q. Which one of the following graphs represents the variation of electric field with distance $r$ from the centre of a charged spherical conductor of radius $R$?
A) [image:1_image175.emf]
B) [image:1_image176.emf]
C) [image:1_image177.emf]
D) [image:1_image178.emf]
Explanation
(c) Electric field due to a hollow spherical conductor is gonerned by following equation $\ \ \ \ \ \ \ \ \ E = 0$ for $r < R\ \ \ $….(i)
and $E = \frac{\mathcal{Q}}{4\pi\varepsilon_{0}r^{2}}\ for\ r \geq R$
$i.e.,$ inside the conductor field will be zero and outside the conductor will vary according to
$E \propto \frac{1}{r^{2}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.