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AP Physics 2
11.7 Kirchhoff’s Junction Rule
11.6 Kirchhoff’s Loop Rule
11.5 Compound Direct Current (DC) Circuits
11.3 Resistance, Resistivity, and Ohm’s Law
AdvancedMCQMathematicalProportional AnalysisConceptual24.5k
Circuit schematic with a real battery and three identical light bulbs.
Circuit schematic with a real battery and three identical light bulbs.
A battery with electromotive force \(\mathcal{E}\) and non-negligible internal resistance \(r\) is connected to three identical light bulbs, labeled 1, 2, and 3, each having constant resistance \(R\). Bulb 1 is in series with the parallel combination of Bulb 2 and Bulb 3. While the circuit is operating, the filament in Bulb 2 suddenly breaks, causing Bulb 2 to become an open circuit. Which row in the table correctly describes the changes in the battery's terminal voltage, the current through Bulb 1, and the current through Bulb 3 after Bulb 2 burns out?

ChoiceTerminal VoltageCurrent in Bulb 1Current in Bulb 3
(A)DecreasesDecreasesIncreases
(B)IncreasesDecreasesDecreases
(C)IncreasesDecreasesIncreases
(D)DecreasesIncreasesDecreases

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