# Wanna Be An AC System GEEK...

Hey Guys,

If you ever wanted to see how AC works and how it works in generators and motors and what have you…then this is the link for you…

http://www.physclips.unsw.edu.au/jw/AC.html

Man I should have paid more attention in school…lol

"So impedance is the general name we give to the ratio of voltage to current. It has the symbol Z. Resistance is a special case of impedance. Another special case is that in which the voltage and current are out of phase by 90°: this is an important case because when this happens, no power is lost in the circuit. In this case where the voltage and current are out of phase by 90°, the ratio of voltage to current is called the reactance, and it has the symbol X. We return to summarise these terms and give expressions for them below in the section *Impedance of components](http://www.physclips.unsw.edu.au/jw/AC.html#component), but first let us see why there are frequency dependence and phase shifts for capacitors and for inductors. "*

So thats impedance…I thought is was what happens to guys (other guys. not me of course ) especially as they get older.

Wow …suddenly it all makes sense.

no one got my PUN…Paid…get it…ahhh…nevermind.