General › G5 Electrical Principles › G5A06
G5A06
How does a capacitor react to AC?
Pick an answer to check it.
Answer: A. As the frequency of the applied AC increases, the reactance decreases
Capacitive reactance falls as frequency rises: XC = 1 / (2 x pi x f x C). A capacitor passes high frequencies more easily. Amplitude does not change reactance.
Tip: Capacitor: higher frequency, lower reactance.