Physics 1402A/B Lecture Notes - Lecture 13: Rc Circuit, Capacitor, Resistor
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The voltage across a capacitor cannot change instantaneously. Rc circuit: a circuit that includes a resistor and capacitor. A capacitor that is initially uncharged has a zero voltage across it. As charge accumulates on the plates, the capacitor voltage increases proportionately. As the capacitor voltage increases, the resistor voltage drops. Decreases the rate at which charge accumulates in the capacitor. Final state: capacitor voltage approaches the battery voltage, and the resistor voltage and current tend to zero current in the circuit is zero. Voltage and current in this circuit to decay toward zero. E(cid:374)ergy stored i(cid:374) the (cid:272)apa(cid:272)itor"s ele(cid:272)tri(cid:272) field is gradually dissipated as heat i(cid:374) the resistor. You can replace the capacitor with a short circuit if it"s u(cid:374)(cid:272)harged or, if it"s (cid:272)harged, (cid:449)ith a (cid:271)attery (cid:449)hose e(cid:373)f is the (cid:272)apa(cid:272)itor"s i(cid:374)itial (cid:448)oltage. You can replace the capacitor with an open circuit.