Calculate the time constant of a resistor-inductor (RL) circuit. Determines how quickly current reaches steady state after a voltage change.
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Inductance in millihenries.
Resistance in the RL circuit.
How this calculator works
The RL time constant tau is the inductance L divided by resistance R. After one time constant, the current reaches ~63.2% of its final steady-state value.
Common questions about this calculator
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