Answer: Radius.
- A Stored charge
- B Radius
- C Electric potential
- D Surrounding air
Correct answer: B. Radius
Explanation: For an isolated sphere C = 4πε<sub>0</sub>R, which depends only on the radius R, not on the charge or potential it happens to have.
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.
Read the full Electrostatic Potential and Capacitance notes →