Which formula represents capacitive reactance?

The formula representing capacitive reactance is accurately defined by the option that states Xc = 1 ÷ (2 x 3.14 x ƒ x C). Capacitive reactance (Xc) is a measure of how much a capacitor resists the flow of alternating current (AC) due to its capacitive properties.

This formula shows that capacitive reactance is inversely proportional to both the frequency (ƒ) of the AC signal and the capacitance (C) of the capacitor. As frequency or capacitance increases, the reactance decreases, indicating that capacitors allow higher frequencies to pass through more easily while resisting lower frequencies.

In the context of electrical circuits, understanding capacitive reactance is crucial, especially when dealing with AC circuits that involve capacitors. These concepts are foundational for anyone learning about electrical systems and components.

Other formulas listed either pertain to different concepts. For instance, the expression involving R + jX pertains to complex impedance, which incorporates both resistance and reactance but does not specifically represent capacitive reactance alone. Similarly, the formula regarding V/I defines impedance rather than specifically addressing capacitive characteristics. Finally, the first formula, while similar in form, does not accurately represent capacitive