An Isolated Conductor with a Cavity

An Isolated Conductor with a Cavity

the same hanging conductor now with a cavity that is totally with in  He conductor It is perhaps reasonable to suppose that when we scoop out the electrically neutral material to form the cavity we do not change the distribution of Charge or the pattern of the electric field that exists in Again we must turn to Gauss’ law for a quantitative proof We draw a Gaussian surface surrounding the cavity close to its surface but in side the conducting body Because E = 0 inside the conductor there can be no flux through this new Gaussian surface Therefore from Gauss’ law that surface can enclose no net charge We conclude that there is no net charge on the cavity walls all the excess charge remains on the outer surface of the conductor.

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