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  4. For a uniformly charged sphere, the electric field from its centre :-

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Q. For a uniformly charged sphere, the electric field from its centre :-

Electric Charges and Fields

Solution:

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$E=\frac{ KQr }{ R ^{3}} \,\,\, r < R $
$ E =\frac{ KQ }{ r ^{2}} \,\,\, r > R $