Physics

Inductive and capacitive reactance behave oppositely because they represent opposite effects on current flow. In an inductor, a changing current induces a back-EMF proportional to how fast the current changes—higher frequency means faster changes, so stronger opposition ($X_L = \omega L$). A capacitor, by contrast, stores charge more readily at higher frequencies because the voltage across it changes faster, allowing charge to flow on and off the plates more easily ($X_C = 1/\omega C$). Think of it as: inductors resist change, while capacitors embrace it.

Inductive and capacitive reactance behave oppositely because they represent opposite effects on current flow. In an inductor, a changing current induces a back-EMF proportional to how fast the current changes—higher frequency means faster changes, so stronger opposition ($X_L = \omega L$). A capacitor, by contrast, stores charge more readily at higher frequencies because the voltage across it changes faster, allowing charge to flow on and off the plates more easily ($X_C = 1/\omega C$). Think of it as: inductors resist change, while capacitors embrace it.