Inductance and capacitance {reactance}| aid or impede current flow by storing and releasing energy, without heat loss.
comparison
Resistance opposes current and has heat loss.
phase
Reactance causes lag between voltage and current. In inductors, high frequency makes big current change and so large voltage. High inductance makes current changes make big voltage changes. Inductive reactance R equals two times pi times frequency f times inductance L: R = 2 * pi * f * L. In capacitors, high frequency makes voltage stay low, because little charge can build up. High capacitance requires large charge to make voltage, so voltage stays low. Capacitive reactance R equals reciprocal of two times pi times frequency f times capacitance C: R = 1 / (2 * pi * f * C).
Physical Sciences>Physics>Electromagnetism>Circuit>Impedance
5-Physics-Electromagnetism-Circuit-Impedance
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Date Modified: 2022.0224