Question

A square surface of side $L$ meter in the plane of the paper is placed in a uniform electric field $E(volt/m)$ acting along the same plane at an angle $q$ with the horizontal side of the square as shown in figure. The electric flux linked to the surface, in units of volt $m$ is

• A. $EL^2$
• B. $EL^2 \cos \theta$
• C. $EL^2 \sin \theta$
• D. zero

Answer 1

Answer: (D)

zero

Answer 2

Flux of electric field $\overrightarrow{ E }$ through any area $?$ is defined as $\phi=E \cdot A \cos \theta$ or $\phi=\overrightarrow{ E } \cdot \overrightarrow{ A }=0$ the lines are parallel to the surface.