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AP Physics 2
11.8 Resistor-Capacitor (RC) Circuits
11.4 Electric Power
IntermediateMCQConceptual24.4k
A rectangular schematic diagram of a single-loop series circuit. The bottom horizontal branch contains an ideal DC battery labeled \(\Delta V\) with its longer positive plate on the left and shorter negative plate on the right. The left vertical branch contains an open switch labeled \(S\). The top horizontal branch contains a resistor labeled \(R\) represented by a zigzag line. The right vertical branch contains a parallel-plate capacitor labeled \(C\) represented by two equal parallel vertical lines. Standard thin lines connect all components in a single closed loop. No other labels, lines, or text appear.
Series RC circuit connected to an ideal battery.
An uncharged parallel-plate capacitor of capacitance \(C\), a resistor of resistance \(R\), an ideal battery of potential difference \(\Delta V\), and an open switch are connected in series, as shown in the circuit diagram. At time \(t = 0\), the switch is closed. Which of the following correctly compares the energy \(U_C\) stored in the capacitor long after the switch is closed (\(t \to \infty\)) to the total energy \(E_{\text{batt}}\rangle\) supplied by the battery during this process, and provides the correct physical justification?

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