PPolySim OS

RLC Circuit

Apply a step voltage to a series RLC circuit and watch charge and current respond — the electrical twin of a damped oscillator.

RLC Circuit StudioLive

Controls

Apply a step voltage to a series RLC circuit and watch charge and current respond — under-, over-, or critically damped.

Presets

▶ Run in Python

Data Inspector

Damping ζ0.750
Regimeunderdamped
ω₀1.000

Governing equation

Reading this result: ζ = 0.750 < 1: underdamped. With ω₀ = 1.000 rad/s the charge overshoots and rings, oscillating while it decays toward its steady value. Lower ζ means more ringing.

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How it works

The circuit is governed by a second-order ODE, L·q″ + R·q′ + q/C = V, integrated in time. The damping ratio ζ decides whether the response oscillates (underdamped), returns slowly (overdamped), or settles as fast as possible without overshoot (critically damped).

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Frequently asked questions

Is this RLC circuit simulation tool really free?▾
Yes. RLC Circuit runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.
Do I need to install anything?▾
No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.
Can I save or share my simulation?▾
Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.
How accurate are the results?▾
The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.