Science & engineering

Capacitive & inductive reactance

Find ideal reactance magnitudes and signed imaginary impedance at a frequency.

Capacitive & inductive reactance
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A clear answer. Here’s how.

For positive frequency, inductive reactance is X_L=2πfL and capacitive magnitude is X_C=1/(2πfC). Under the e^(jωt) convention the corresponding imaginary impedances are +jX_L and −jX_C. Reports the individual elements without assuming a connection or a DC model.

See a worked example

Worked example

A fixed demonstration, separate from the values you enter above.

Frequency (Hz)
1000
Inductance (mH)
10
Capacitance (µF)
1

Example result

Inductive reactance magnitude
62.8318530718 Ω
Capacitive reactance magnitude
159.154943092 Ω
Inductor imaginary impedance
+j62.8318530718 Ω
Capacitor imaginary impedance
−j159.154943092 Ω