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Give reason : "If net flux assocaited wi...

Give reason : "If net flux assocaited with closec surface is zero, then net charge enclosed b that surface is zero."

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The law implies that the total electric flux through a closed surface is zero if no charge is enclosed by the surface.

The electric field is uniform and we an considering a closed cylindrical surface with it axis parallel to the uniform field `vecE`.
`phi_(1)` and `phi_(2)` represent the flux through the surfaces 1 and 2 of the cylinder and `phi_(3)` is the flux through the curved cylindrical part of the closed surface.

Hence, `phi_(1) =-ES_(1) =-ES (therefore S_(1) =S)`
`phi_(2) = ES_(2) = ES (therefore S_(2) =S)`
where S is the area of circular cross-section.
Thus, the total flux is zero, the total charge contained in the closed surface is zero.
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