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 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

Question

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 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) (c) and (d) only (B) (b) and (d) only (C) (d) only (D) (a) and (c) only

Tardigrade Admin · Accepted Answer

Since φ= vec E ⋅ vec A = EA cos θ <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/4902169ed164cca2c33d6d1dbc39231d-.png" /> θ=90° ∴ φ=0

(c) and (d) only

(b) and (d) only

(d) only

(a) and (c) only

Since ϕ=E⋅A=EAcosθ θ=90∘ ∴ϕ=0

Since $ϕ = E \cdot A = E A cos θ$

$θ = 9 0^{\circ}$
$∴ ϕ = 0$