Q 1.19: A point charge of is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?
q = net charge inside the cube =
Using Gauss’s law, we know that the flux of electric field through any closed surface S is times the total charge enclosed by S.
where, q = net charge enclosed and = permittivity of free space (constant)
(Note: Using Gauss's formula, we see that the electric flux through the cube is independent of the position of the charge and dimension of the cube! )