The obstructive effect of capacitors on alternating current is called capacitive reactance.
The capacitance is large, and the alternating current is easy to pass through the capacitor, indicating that the capacitance is large, and the obstructive effect of the capacitor is small; the frequency of alternating current is high, and the alternating current is also easy to pass through the capacitor, indicating that the frequency is high, and the obstructive effect of the capacitor is also small.
Experiments have shown that capacitive reactance is inversely proportional to capacitance and also inversely proportional to frequency.
If capacitive reactance is represented by XC, capacitance is represented by C(F), and frequency is represented by f(Hz), then Xc=1/2πfc The unit of capacitive reactance is ohms. Knowing the frequency f and capacitance C of the alternating current, the capacitive reactance can be calculated using the above formula.
The inductance of the coil has an obstructive effect on alternating current, and this obstruction is called inductive reactance. If the inductance is large, it is difficult for the alternating current to pass through the coil, indicating that the inductance is large, and the inductance has a large obstructive effect; the frequency of alternating current is high, and the alternating current is also difficult to pass through the coil, indicating that the frequency is high, and the obstructive effect of inductance is also great.
Experiments have proved that inductance is proportional to inductance and also proportional to frequency.
If the inductance is represented by XL, the inductance is represented by L (H), and the frequency is represented by f (Hz), then the unit of XL=2πfL inductance is ohm. Knowing the frequency f of the alternating current and the inductance L of the coil, the inductance can be calculated using the above formula.
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