Enter your Inductance Value and Frequency (with their respective units) to calculate the Inductive Reactance (XL) your inductor presents at that frequency — along with the Angular Frequency (ω), Impedance Magnitude, and Phase Angle so you have the full picture of how your inductor behaves in an AC circuit.
Inductive Reactance (XL)
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Angular Frequency (ω)
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Impedance Magnitude
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Phase Angle
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Inductive reactance (XL) is the effective resistance offered by an inductor to alternating current. It increases with frequency and inductance value, calculated using the formula XL = 2πfL.
Use the formula XL = 2πfL, where XL is inductive reactance in ohms, f is frequency in hertz, and L is inductance in henries. Higher frequency or inductance results in higher reactance.
Inductive reactance increases with frequency while capacitive reactance decreases with frequency. Inductors oppose changes in current, while capacitors oppose changes in voltage.
In DC circuits (frequency = 0 Hz), inductive reactance is zero. This means inductors act like short circuits to direct current, offering no opposition to steady-state DC flow.
Rearrange the formula to L = XL/(2πf). If you know the inductive reactance and frequency, you can calculate the inductance value of the coil.
The SI unit of inductive reactance is the ohm (Ω), same as electrical resistance. It represents the opposition to current flow in the inductor.
Higher frequency means faster changing current, which induces a stronger back EMF in the inductor according to Lenz's law. This creates greater opposition to current flow, increasing reactance.
In a pure inductor, current lags voltage by 90 degrees (π/2 radians). The impedance has a phase angle of +90°, making it purely reactive with no resistive component.