Answer: Total charge enclosed inside.
- A Total charge outside
- B Total charge enclosed inside
- C Electric field at surface
- D Area of surface
Correct answer: B. Total charge enclosed inside
Explanation: Gauss's law: phi = Q<sub>enclosed</sub> / epsilon<sub>0</sub>. Electric flux through any closed surface equals enclosed charge divided by epsilon<sub>0</sub>.
Field lines (radial) and equipotential lines (concentric circles) of a point charge. Equipotential surfaces are always perpendicular to the field lines. Image: Sjlegg, Public Domain, via Wikimedia Commons.
Concept context
Electric potential, equipotential surfaces, potential energy of charge systems, conductors, dielectrics, capacitors, combinations, and energy storage.
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