Q.

If the net electric flux over a Gaussian surface is zero, then select the correct option

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a

Electric field at any point on the Gaussian surface may not be zero

b

Electric field at any point on the Gaussuan surface must not be zero

c

Electric field at any point on the Gaussian surface must be zero

d

No electric charge should reside inside the Gaussian surface

answer is B.

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Detailed Solution

If net flux is zero by Gauss's law, ϕ=E. dA=0. In this case net charge enclosed by the Gaussian surface must be zero. But charge may reside out side

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