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Coil Meter

Open up a galvanometer. Balance its coil against the spring.

Physics · Class 12 · The moving-coil galvanometer · 6 simulations. For JEE, NEET and your boards.

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What you'll learn

  1. Balance the spring: The coil balances the spring: N B I A = k φ
  2. Read the scale: The swing is in step with the current
  3. Size the coil: Size the coil from the balance
  4. More turns, same wire: Current and voltage sensitivity
  5. Keep R the same: Hold R, and both sensitivities grow
  6. Build, then shunt: Find the coil's full-scale current, then shunt it