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AP Physics C: E&M
11.8 Resistor Capacitor (RC) Circuits
11.6 Kirchhoff’s Loop Rule
11.5 Compound Direct Current Circuits
IntermediateMCQMathematicalConceptual13.1k
A circuit schematic with rectangular wire loops. On the far left, a vertical branch contains a DC battery with a long upper horizontal plate labeled with a plus sign and a shorter lower plate, labeled \(\mathcal{E}\). Wires extend horizontally to the right from the top and bottom terminals of the battery to connect two vertical parallel branches. The first vertical branch contains an upper resistor labeled \(R\), a central junction labeled \(X\), and a lower resistor labeled \(3R\). The second vertical branch, positioned to the right of the first, contains an upper resistor labeled \(3R\), a central junction labeled \(Y\), and a lower resistor labeled \(R\). A horizontal cross-branch connects junction \(X\) and junction \(Y\), containing a capacitor with two equal vertical parallel plates labeled \(C\). No other labels, lines, text, or axes appear.
Bridge circuit with four resistors and a cross-branch capacitor connected to a battery.
A circuit is constructed using an ideal battery of electromotive force \(\mathcal{E}\), four resistors, and an initially uncharged capacitor of capacitance \(C\). Two parallel branches connect the terminals of the battery: the first branch contains a resistor of resistance \(R\) in series with a resistor of resistance \(3R\) meeting at junction \(X\), and the second branch contains a resistor of resistance \(3R\) in series with a resistor of resistance \(R\) meeting at junction \(Y\). The capacitor connects junction \(X\) directly to junction \(Y\). After the circuit has reached a steady state, which of the following correctly identifies the potential difference across the capacitor and the plate that is at a higher electric potential?

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