RL Time Constant
Find current rise time scales in an ideal series RL circuit.
Your numbers
Time constant
Idealized SI-unit educational model. Real components, tolerances, losses and safe operating limits require separate verification.
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Formula
τ=L/R
Find current rise time scales in an ideal series RL circuit.
Worked example
- Inductance (mH)
- 100
- Total series resistance (Ω)
- 10
- Time constant
- 0.01 s
- Time to 99% of final current
- 0.0460517018599 s
Scope and limitations
Idealized SI-unit educational model. Real components, tolerances, losses and safe operating limits require separate verification.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
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Formula version: 1ad0e3042713 · Example checked: