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RL Timer

Close a switch on a coil and a resistor. Predict the current in time.

Physics · Class 12 · Growth and decay in an RL circuit · 8 simulations. For JEE, NEET and your boards.

A picture of the RL Timer simulation

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What you'll learn

  1. One time constant: The current grows with a time constant
  2. First instant, long after: A coil at the first instant and long after
  3. Halfway there: Half-way takes τ ln 2
  4. Energy at the end: A coil stores energy in its field
  5. Fastest filling: Energy flows in fastest at half current
  6. Cut out the cell: With the cell out, the current dies away
  7. Two coils, one cell: The cell's current, from the first instant to the end
  8. Two ideal coils: Ideal coils side by side share one voltage