>>11464820danm, first of all is a bad idea to consider impedance at resonance """to infinite""" this will cause you a lot of trouble if you don't understand that this is ONLY the theoretical models but in reality theres NO such thing as infinite impedance, this situation is so bad that some people even think that this means we can get ""free energy"" out of coils and capacitors and this ignorant people claim Steinmetz and Tesla claim so (they never did)...
... LC circuits DO NOT HAVE INFINITE impedance and they do NOT act like an open circuit, power is dissipated in that LC tank plus the resistor because like this anon said
>>11465161 impedance is ALWAYS FINITE even at resonance . "ideal models" are only a modeling tool but they should never be considered without the rest of the picture with parasitic elements that are intrinsic to nature
see pic and also use this page to play around with filters and it'll give you responce curves, I used it all the time:
http://sim.okawa-denshi.jp/en/RLCbekeisan.htm theoreticaly a series LC is basically the same as a parallel but the behaviour/curve is upside-down, the resistor affects the Q of the coil, low resistance= high Q, high R=low Q
