Change of Voltage

If they are alternating currents, also known as AC, with high frequencies and with reactance, because they are relatively reduced, they can go unnoticed in analyzes carried out near the circuit. It is worth mentioning that the amount of resistance that must exist in a capacitor, whether it is under alternating currents, is determined as a capacitive reactance, since it must vary according to the frequency variation of the alternating current signal.               gates bx90

Thus, the capacitive reactance must be determined by XC, since it refers to the capacitive reactance, indicated in ohms; the letter f, which refers to the frequency of the AC signal, in hertz (Hz); and the letter C, shall determine the capacitance indicated in Farads.

Therefore, it must always be inverse to the signal frequency. The reactance is termed this way, since the capacitor has the ability to react rapidly to changes in voltage, or even in the potential difference. Considering that DC or DC signals count frequently at zero, the formula must confirm that the capacitors can fully block the applied current directly after a certain time in which the capacitor must be charged.