Define electric flux. Is it a scalar or a vector quantity ?
A point charge q is at a distance of d/2 directly above the centre of a square of side d, as shown
in the figure. Use Gauss’ law to obtain the expression for the electric flux through the square.
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Electric flux, property of an electric field that may be thought of as the number of electric lines of force (or electric field lines) that intersect a given area.
Electric flux is a flow of electric field through a given area. It is a scalar quantity
Suppose a cube enclosing the charge q of side d. One of the faces of the cube is the square as given in the figure.
Hence according to Gauss's law, the electric flux through the cube is
q/ϵ
From symmetry, the flux through the face is 1/6 th of the flux through the cube.
hence flux through the face = q/6ϵ
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