Question 98 of 311

Choose the incorrect statement:
(a) The electric lines of force entering into a Gaussian surface provide negative flux.
(b) A charge $q$ is placed at the centre of a cube. The flux through all the faces will be the same.
(c) In a uniform electric field net flux through a closed Gaussian surface containing no net charge, is zero.
(d) When an electric field is parallel to a Gaussian surface, it provides a finite non-zero flux.
Choose the most appropriate answer from the options given below:

A(b) and (d) OnlyB(c) and (d) OnlyC(a) and (c) OnlyD(d) Only

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Answer: (D) (d) Only

We know that electric flux is a scalar quantity and this is the scalar product of the magnitude of electric field and surface area.

Recall, the formula given by Gauss theorem, $\phi =\vec{E}\cdot \vec{A}=EA\cos \theta$, here $\theta =90^{\circ}$, it means, $\phi =0$.