Question

A charge $Q$ is placed at a distance $a/2$ above the centre of the square surface of edge a as shown in the figure. The electric flux through the square surface is :

• A. $\frac{Q}{3{ϵ}_0}$
• B. $\frac{Q}{6{ϵ}_0}$
• C. $\frac{Q}{2{ϵ}_0}$
• D. $\frac{Q}{{ϵ}_0}$

Answer 1

The correct option is B $\frac{Q}{6{ϵ}_0}$

A charge $Q$ is placed at a distance $=a/2$

the centre of the square surface of edge a as shown in figure. The electric flux through the square surface. Due to symmetry electric field flux through that surface should be $\varphi =\frac{Q}{6{ϵ}_o}$