Question

When the surface is parallel to the electric field lines, what is the resulting electric flux?

Options

• \[\Phi = 0\]

• \[\Phi = EA/2\]

• \[\Phi = EA\]

• \[\Phi = -EA\]

Answer 1

When the surface is parallel to the electric field lines, the field is tangent to the surface and perpendicular to the area vector. Therefore, the dot product \[\vec{E} \cdot d\vec{A} = 0\], resulting in zero flux. No field lines pass through the surface.