Q. The electric field due to a dipole at a distance $r$ on its axis is
A) Directly proportional to $r^{3}$
B) Inversely proportional to $r^{3}$
C) Directly proportional to $r^{2}$
D) Inversely proportional to $r^{2}$
Explanation
(b) $E = \frac{1}{4\pi\varepsilon_{0}}.\frac{2p}{r^{3}} \Rightarrow E \propto \frac{1}{r^{3}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.