Understanding Capacitance and Impedance in Series Circuits

[vetgirl1990]

Homework Statement

This is not necessarily a homework question, just a conceptual one.

I was reading up on capacitors, and an example said that a 25uF capacitor has TWICE the impedence of a 50uF capacitor. Can someone explain what this means? I would have thought that a capacitor with higher capacitance would impede a circuit more...

Homework Equations

The Attempt at a Solution

 

[cnh1995]

Do you have the formula for capacitive reactance? It clearly tells you that capacitive reactance is inversely proportional to the capacitance.

 

[NascentOxygen]

You could make a 25μF capacitance by connecting two 50μF capacitors in series. For the pair in series you have double the impedance of a single capacitor because impedances in series add.