what role does resonant frequency play in passive filters. I know XL = XC, but why would this be used in passive filters.

1. is the resonant frequency the crossover frequency?

2. XL would equal XC. this is were maximum power transfer takes place?

3. there would be little power loss?

if any of this is correct please could you just say yes to the number that is correct.

I started looking at complex impedance and angular frequency to try and figure this out but I think there is a rather large gap to fill in my education before I do that!

cheers

simon