[SOLVED] Electrical Resonace basics

[timkuc]

Electrical Resonance basics

Is it possible to gain infinite amplitude at resonance in practical situations in electrical circuit?( Please use example )

 

[chuckey]

No, the voltage builds up until the power losses in the circuit equal the power input. I have built real circuits where the voltage across the tuned circuit was 100 times that of the input voltage. This required very special coils and low loss capacitors, it is about the maximum you can expect, most circuits the Q (voltage multiplication factor) can be taken as 100 or so. And of course when you go to use this voltage, you are loading the circuit, the Q falls and so does the available voltage.
Frank

 

[Audioguru]

A resonant circuit is not an amplifier. It simply converts impedances.
A parallel LC resonant circuit is a high impedance that produces a higher voltage when its load is a high impedance. A series LC resonant circuit reduces the voltage at resonance because it is a low impedance.