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Reactance and resonance calculator

XL, XC and the LC resonant frequency.

Try the circuit in the labBuild it on the simulator's bench and measure it.

How it is worked out

An inductor's opposition to AC rises with frequency, XL = 2πfL; a capacitor's falls, XC = 1 ÷ (2πfC). Where they are equal the circuit resonates: f0 = 1 ÷ (2π√(LC)).

Example: 10 mH with 1 µF resonates at 1.59 kHz. At 1 kHz the inductor is 62.8 Ω and the capacitor 159 Ω.

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