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AP Physics 2
11.7 Kirchhoff’s Junction Rule
11.5 Compound Direct Current (DC) Circuits
11.3 Resistance, Resistivity, and Ohm’s Law
IntermediateMCQProportional AnalysisConceptual14.9k
Circuit diagram before switch S is closed.
Circuit diagram before switch S is closed.
A circuit contains an ideal battery of constant potential difference \(\Delta V\) connected across two parallel resistors, \(R_1\) and \(R_2\). A switch is then closed to connect a third resistor, \(R_3\), in parallel with \(R_1\) and \(R_2\). Which of the following correctly predicts the change in the total current supplied by the battery and provides the correct physical justification?

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