A square surface of side L metres is in the plane of the paper. A uniform electric field vecE (volt/m), also in the plane of the paper, is limited only to the lower half of the square surface (see figure). The electric flux in SI units associated with the surface is :-

Question

A square surface of side L metres is in the plane of the paper. A uniform electric field vecE (volt/m), also in the plane of the paper, is limited only to the lower half of the square surface (see figure). <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/5d40964d904c017bd30b79cf07e53b8c-.jpeg" /> The electric flux in SI units associated with the surface is :- (A)  EL2  (B)  EL2 / 2 ε0 (C)  EL2 / 2  (D) zero

Tardigrade Admin · Accepted Answer

φ= vec E ⋅ vec S = ES cos 90°=0 (∴ area vector is perp r vec E

Q. A square surface of side L metres is in the plane of the paper. A uniform electric field $E$ (volt/m), also in the plane of the paper, is limited only to the lower half of the square surface (see figure).

The electric flux in SI units associated with the surface is :-

$E L^{2}$

$E L^{2} /2 ε_{0}$

$E L^{2} /2$

zero

$ϕ = E \cdot S = ES cos 9 0^{\circ} = 0$
$(∴$ area vector is $⊥^{r}$ $E$

Q. A square surface of side L metres is in the plane of the paper. A uniform electric field E (volt/m), also in the plane of the paper, is limited only to the lower half of the square surface (see figure). The electric flux in SI units associated with the surface is :-

EL2

EL2/2ε0​

EL2/2