Answer: (1/2) epsilon0 E2 V.
- A (1/2) epsilon0 E2 V
- B epsilon0 E2 V
- C (1/2) epsilon0 E V
- D epsilon0 E V
Correct answer: A. (1/2) epsilon0 E2 V
Explanation: Energy density = (1/2)epsilon0 E2. Total energy in volume V = (1/2)epsilon0 E2 x V.
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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