Question

For the chosen surface, how is the flux evaluated when \[\vec E\] is parallel to \[d\vec A\]?

Options

• Evaluate the flux \[\Phi = E \cdot A\]

• Find the enclosed charge \[Q_{\mathrm{enc}}\]

• Use \[E = Q_{\mathrm{enc}}/A\]

• Set the flux equal to zero on every part of the surface

Answer 1

When the electric field is parallel to the area vector on the chosen surface, the flux is evaluated as \[\Phi = E \cdot A\]. This is the flux-evaluation step of the method.