When a piece of paper is held with one face perpendicular to a uniform electric field the flux through it is 25 N.m²/C.When the paper is turned 25 ° with respect to the field the flux through it is: A)0 N.m²/C B)11 N.m²/C C)12 N.m²/C D)23 N.m²/C E)25 N.m²/C

Question

Quizplus · Accepted Answer

The electric flux through a surface is given by the formula Φ = EAcosθ, where E is the electric field, A is the area, and θ is the angle between the field and the normal to the surface. Initially, θ = 0°, so Φ = 25 N·m²/C. When the paper is turned 25°, θ = 25°, so the new flux is 25 * cos(25°) ≈ 23 N·m²/C.

When a Piece of Paper Is Held with One Face