unfortunatelly books in general do very bad at explaining the intricacies, for some reason the teching of EE and even physics are too much focused on formulae and not that much in the physical behaviour itself, one would say its implicit in the formulae but that is NOT true, gravity is a famous case were Newton had a formula for gravity but he didn't knew what was gravity itself.
>>12670950yes, the first principal is that they can store charge, the second is that they are isolators to DC, from those two principals is that their capacity to store a charge becomes a "filter of frequency", a third principal is that the filter behaviour is directly related to the rest of the circuit (basically to the impedance/resistance of the circuit) by itself a capacitor will not show a filtering characteristic (except to DC of course) but is the interaction of the stored charge WITH the rest of the circuit that produces filtering for example if a capacitor in series with a load doesn't hold enough charge it will not be able to "dump"(discharge) enough electrons into that load to create low frequencies with enough ""oomph""(current) so this capacitor will be said to be filtering low frequencies
capacitors are a beautiful thing. I hope that was helpefull OP, God bless.
