Q69 / 90 · JEE Main 2021 (31 Aug Shift 2) · Physics
Choose the incorrect statement:
(a) The electric lines of force entering into a Gaussian surface provide negative flux.
(b) A charge 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:
Choose the incorrect statement:
(a) The electric lines of force entering into a Gaussian surface provide negative flux.
(b) A charge 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) Only
- B(c) and (d) Only
- C(a) and (c) Only
- Correct answerD(d) Only
Solution
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, , here , it means, .
Hence, the correct answer is option: 'D'.