How Capacitive Reactance Works?
Capacitive reactance (symbol XC) is the resistance offered by a capacitor to an AC (alternating current) signal. It works like resistance but it changes which depends on the frequency of the signal and the value of the capacitor.
The formula to calculate capacitive reactance is:
XC = 1 / (2 × π × f × C)
Where:
- XC is the reactance in ohms (Ω)
- f is the frequency in hertz (Hz)
- C is the capacitance in farads (F)
Key Points:
- Reactance is high at low frequencies and low at high frequencies.
- For DC (0 Hz) reactance is infinite—capacitor blocks it.
- For high-frequency AC, the capacitor easily allows current to pass.
Example:
- A 1 µF capacitor at 50 Hz has a reactance of about 3.2 kΩ.
- The same capacitor at 10 kHz will have a reactance of just 16 Ω.
This is why, capacitors are commonly used to filter out DC and pass AC especially in power supplies and signal processing.
Calculator by homemade-circuits.com
How to calculate the voltage drop across a capacitor. For example if I am connecting 135J in series to the phase what would be the voltage available on the other side
There will no voltage drop when AC is passed through a capacitor, there will be drop in current.
If you connect 220V to a capacitor, the other side will also be 220V.
i want to connect capacitor to the Mains in Series with the another circuitry ( series Impedance application )
Now which type ( polypropelene ,Metalised Polypropelen ,Film Foil type AC) & make like vishay ,deki ,ctr?
i will calculate reactance value as per my need.
It can be of this type:
Thanks for prompt reply.
sir may i choose interference suppression x2 type of vishay make ?
Yes definitely you can use them!
simply calculate-1 mikrofarad on 230VAC,50 Hz is about 70mA
What is the meaning of c2 in your FM circuit? Please show me a photo of it.you said you can tune it with screw driver
gracias por la calculadora gracias por sus articulos le estoy siguiendo gracias por difundir conocimiemto util para nosotros le felicito por su loable gesto freddy sanchez managua nicaragua
Thank you! Appreciate your response very much!!