Question

state gauss's theorem in electrostatics apply this theorem derive an expression electric field intensity at a point near an infinitely long straight charged wire

Answer 1

It states that - "Thus Gauss' law states that electric flux through any closed surface is equal to the net charge enclosed inside the surface divided by permittivity of the vacuum (denoted by epsilon naught).

Answer 2

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HERE'S YOUR ANSWER
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It states that - "The electric flux through any closed surface is equal to the net charge enclosed inside the surface divided by permittivity (ɛ) of vacuum.
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♢Derivation of Electric Field Intensity at a point near an infinitely long charged straight wire♢

It is provided in the attached file.

Comment below if anything not understood.
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