📌 Variation of Electric Potential with Distance:

For a thin charged spherical shell of radius <b>R</b> and charge <b>Q</b>:

Region | Potential

─────────────────────────────────────────────

Inside (r R) | V = kQ/r (decreases as 1/r)

Graph Description:

← Constant inside (V = kQ/R)

← Hyperbolic decrease outside (V ∝ 1/r)

Key Points:

• <b>Inside</b>: E = 0 → V = constant = surface value.
  • <b>Outside</b>: V decreases like 1/r (similar to point charge).