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Why do we use Gauss elimination method?

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Gauss's theorem states that total electric flux Φ emanating from a closed surface is equal to (a) Total current density on the surface (b) Total charge enclosed by that surface (c) Total current on the surface (d) Total charge density within the surface

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Gauss's theorem states that total electric flux Φ emanating from a closed surface is equal to Total charge enclosed by that surface

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