= RLC circuit
{c}
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An <RLC circuit> combines <electrical resistance> $R$, <inductance> $L$, and <capacitance> $C$. The <capacitor> stores <energy> in its <electric field>; the <inductor> stores <energy> in its <magnetic field>. Their exchange can produce an <oscillation>, while <Joule heating> removes <energy>. A <series RLC circuit> gives a particularly clear example: changing $R$ turns ringing into a direct return to equilibrium, and changing $L$ or $C$ tunes a <resonance>.
These circuits connect two useful viewpoints. In time, they describe how stored <energy> is released after switching. In <frequency>, they select a range of signals: the <resonant series RLC response> explains radio tuning and simple filters. The same mathematics describes a <damped harmonic oscillator>, so insight about mechanical ringing transfers directly to an <electrical circuit>. https://www.feynmanlectures.caltech.edu/I_23.html#Ch23-S3[Feynman lectures, I.23.3: electrical and mechanical resonance]{ref}; https://www.feynmanlectures.caltech.edu/II_22.html#Ch22-S7[Feynman lectures, II.22.7: frequency filters]{ref}.
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