What is electric flux?

If we say that the cause is electric field then we can say that electric flux is the result of that. So electric flux is nothing but the flow of electrical field through an unit area. If we assume the electrical field to be perpendicular with the area it is flowing through , then there is no complexity in determining the electrical flux φ and S is the area of the surface,

φ = E.S = E.S.cosθ

For perpendicular θ = 90o and θ is the angle if the flow of electrical field is not perpendicular with the area and that angle.

The unit of electric flux is tesla which is actually Weber/m2, where Weber is the unit of electrical field which is actually nothing but V/m.

Now depending on the type of electric field the flux can be of two types. If the field is uniform then the flux will be uniform as well, i.e. the flow of field line will be equally distributed through the area, on the other hand if the field is non uniform, then the field lines are not equally distributed throughout the area, so the flux of this area will be non uniform too. The flux determines the strength of an electric field.