Electric Flux Video Lessons

Concept

# Problem: When is the electric flux on a section of a closed surface zero? a. When the electric field is in the direction of the section's area vector. b. When the electric field is in the direction opposite that of the section's area vector. c. When the electric field is perpendicular to the section's area vector.

###### FREE Expert Solution

Gauss law:

$\overline{){{\mathbf{\varphi }}}_{{\mathbf{E}}}{\mathbf{=}}{\mathbf{\int }}{\mathbf{E}}{\mathbf{·}}{\mathbf{dA}}{\mathbf{=}}\frac{{\mathbf{Q}}_{\mathbf{e}\mathbf{n}\mathbf{c}}}{{\mathbf{\epsilon }}_{\mathbf{0}}}}$

Integrating gauss law:

ϕE = E•Acosθ

The electric flux is zero if either E, A, or cosθ is zero.

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###### Problem Details

When is the electric flux on a section of a closed surface zero?

a. When the electric field is in the direction of the section's area vector.

b. When the electric field is in the direction opposite that of the section's area vector.

c. When the electric field is perpendicular to the section's area vector.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Electric Flux concept. You can view video lessons to learn Electric Flux. Or if you need more Electric Flux practice, you can also practice Electric Flux practice problems.