Question

A charge ‘q’ is placed at the centre of a cube of side l. What is the electric flux passing through each face of the cube?

Answer 1

By using Gauss’s Law.It is given as Now, the flux passing through all the six surfaces would be And the flux passing through each surface would be

............................(1)Cube has six equal faces, so electric flux pass through each would be equal.If A = area of faceand E = field intensity.Then total flux = 6(E*A) = q/ε0So, net electric flux passing through each face of the cube is given by