Compute the electric potential at a point from a point charge q at distance r using V = k·q/r (k is Coulomb's constant).
输入点电荷 q 与距离 r,求电势。
| Item | Standard / Source | Key Point |
|---|---|---|
| Point-charge potential | Coulomb potential; Classic electromagnetism (Griffiths, Electrodynamics) | V = k*q/r with k = 1/(4πε0) |