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Sphere Link

Join spheres with a wire, merge drops or earth a sphere. Predict the charge.

Physics · Class 12 · Joined spheres, drops and earthing · 11 simulations. For JEE, NEET and your boards.

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What you'll learn

  1. Join with a wire: Joined spheres share one potential
  2. Which field is stronger: Same potential, stronger field on the smaller sphere
  3. Same density at the start: Follow the charge, then divide by the area
  4. Merge the drops: Drops merge: volume adds, charge adds
  5. Denser or thinner: Surface density is charge over area
  6. Earth it near a charge: An earthed sphere sits at zero potential
  7. Lift the earth, move the charge: Cut the earth wire: the charge stays
  8. Hollow and solid: A sphere is a capacitor: C = 4πε₀R
  9. Van de Graaff limit: The Van de Graaff generator
  10. Most charge: The most charge a sphere can hold
  11. The sharp tip glows: Corona: the sharpest point glows first