### Formula

X

capacitive reactance

f

frequency

C

capacitance

X

capacitive reactance

f

frequency

C

capacitance

Reactance is the opposition of a circuit element to a change of electric current or voltage, due to element's capacitance or inductance. A built-up electric field resists the change of voltage on the element, while a magnetic field resists the change of current. Capacitive reactance is inversely proportional to the signal frequency f and the capacitance C.

f

C

X

Precision

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