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Electric flux|What is Electric flux ?|Definition
Electric flux : The term flux implies some kind of flow. Flux is the property of any vector field.
The electric flux is a property of electric field.
The electric flux through a given area held inside electric field is the measure of the total number of electric lines of force passing normally through that area.
As shown in Fig, if an electric field


As shown in Fig. 1, if the normal drawn to the area element





=
or,
In case the field








Then the electric flux through the surface Swill be
When the number of area elements becomes infinitely large (N → 0) and AS →0, the above sum approaches a surface integral taken over the closed surface. Thus
Thus the electric flux through any surface S, open or closed, is equal to the surface integral of the electric field E taken over the surface S.
Electric flux is a scalar quantity.
Unit of
SI unit of
Equivalently, SI unit of