Q. A point charge $q$ is placed at a distance $a/2$ directly above the centre of a square of side $a.$ The electric flux through the square is
A) $q/\varepsilon_{0}$
B) $q/\pi\varepsilon_{0}$
C) $q/4\varepsilon_{0}$
D) $q/6\varepsilon_{0}$
Explanation
(d) An imaginary cube can be made by considering charge $q$ at the centre and given square is one of it’s face
So flux from given square ($i.e.$ one face) $\phi = \frac{q}{6\varepsilon_{0}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.