Inductive Reactance
Inductive Reactance
An inductor opposes changes in current, so its reactance rises with frequency — the complement of a capacitor.
The inductive reactance is X_l = 2π·f·L. where f is the frequency and L the inductance.
Inputs
f := 50 Hz=50 Hz
L := 0.1 H=0.1 H
Apply the inductive reactance formula.
X_l := 2·pi·f·L=31.42 Ω
Results
Reactance grows with frequency, so an inductor passes DC and blocks high frequencies — the basis of a low-pass filter and of choke coils.
Assumptions & limitations
- Ideal inductor.
- Sinusoidal steady state.
- Winding resistance neglected.