Loading the page
Loading
Loading
Lesson 4
Drive a resistor and a reactance with a sine and every voltage and current becomes an arrow: a length and an angle. Ohm's law still holds; it just divides lengths and subtracts angles. Commit to predictions first, then drag the arrows yourself.
Predict · 1 of 2 · the angle
A 1 V, 1 kHz sine drives 1 kΩ in series with 100 nF. The source phasor Vs points along the real axis. In the phasor view, drag to aim the current: how many degrees does it lead (up) or lag (down) the source?
Result
Waiting on your call.
Make your call, then lock it in. The answer, your error and the reason land here, and the scope and every view below fire up.
Engine: every phasor is the in-browser MNA solver's AC solution; the scope traces are its exact steady state, v(t) = Re{V ejωt}, and the phase is measured from their zero crossings. Checked against closed form by scripts/impedance-check.mjs and against SPICE (scripts/livewaves-ltspice/imp_*.cir): |Z| within 0.001%, ∠Z within 0.001°, transient phase within 0.01°.