I am studying cap's right now. I understand the premise of blocking most of DC (minus very small leakage) and AC passing through caps, and passing more as frequency increases. My confusion is why not always choose a large cap? If a high frequency always passes capacitors better, whether the cap be big or small (micro f to milli f), why not always choose a large cap, even for filtering problems?
Because as frequency lowers, reactance increases, wouldn't a large cap be the ideal fit always in order to get rid of AC? A large cap would get rid of really high frequencies and the lower AC signals, correct?
I was told by someone today that the reactance equation is not really true, that reactance actually reflects a bell curve when dealing with very wide ranges of frequencies and people have to find the right fit for the frequencies they need to reduce, is this true?
Thanks for your help in advance!
Because as frequency lowers, reactance increases, wouldn't a large cap be the ideal fit always in order to get rid of AC? A large cap would get rid of really high frequencies and the lower AC signals, correct?
I was told by someone today that the reactance equation is not really true, that reactance actually reflects a bell curve when dealing with very wide ranges of frequencies and people have to find the right fit for the frequencies they need to reduce, is this true?
Thanks for your help in advance!