Choose the incorrect statement: (a) The electric lines of force entering into a Gaussian surface provide…

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:

  1. (b) and (d) Only
  2. (c) and (d) Only
  3. (a) and (c) Only
  4. (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, ϕ=E·A=EAcosθ, here θ=90°, it means, ϕ=0.

Asked in: JEE Main 2021 (31 Aug Shift 2)

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