Free RL Time Constant Calculator
Calculate the RL time constant of a resistor-inductor circuit: tau = L / R.
mH
Ω
Time Constant (τ)
0.005000 s
Time Constant (ms)5.0000 ms
Time Constant (τ) vs Inductance
RL Time Constant
The RL time constant governs how quickly current builds up or decays in an inductor-resistor circuit.
Formula
τ = L / R
After one time constant, the current reaches 63.2% of its final steady-state value.
Example Calculation
A 50 mH inductor with a 10 Ω resistor.
- 01τ = L / R
- 02τ = 50e-3 / 10
- 03τ = 0.005 s = 5 ms
Frequently Asked Questions
Learn More
Understanding Newton's Laws of Motion
A comprehensive guide to Newton's three laws of motion. Learn about inertia, force and acceleration, action-reaction pairs, and how these principles govern everyday physics.