Answer: 2/epsilon 0.
- A 2/epsilon<sub>0</sub>
- B 2*epsilon<sub>0</sub>
- C 9 x 10<sup>9</sup>
- D Zero
Correct answer: A. 2/epsilon<sub>0</sub>
Explanation: By Gauss's law: phi = Q/epsilon<sub>0</sub> = 2/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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