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Shell Probe

Walk a probe out through nested metal shells. Predict the field and the potential.

Physics · Class 12 · Metal shells: field and potential · 12 simulations. For JEE, NEET and your boards.

A picture of the Shell Probe simulation

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What you'll learn

  1. Inside the metal: Charge on a metal sits on its surface
  2. Charge in a thick shell: The two walls of a metal shell
  3. V inside a shell: V stays flat inside a shell
  4. Three shells: Add each shell's V at the point
  5. Earth the inner shell: An earthed shell sits at V = 0
  6. A tiny hole: At a hole, half the surface field
  7. Join inner to outer: Joined shells share one V
  8. Off-centre charge: A metal in equilibrium
  9. A pair in the hollow: The inner wall balances what is inside
  10. Three shells, one potential: Two shells at the same potential
  11. Skin of a metal ball: Just outside a metal: E = σ/ε0
  12. Earth the outer shell: Earth the outside shell