Q. According to Gauss’ Theorem, electric field of an infinitely long straight wire is proportional to
A) $r$
B) $1/r^{2}$
C) $1/r^{3}$
D) $1/r$
Explanation
(d) $e = \frac{\lambda}{2\pi\varepsilon_{0}r} \Rightarrow E \propto \frac{1}{r}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.