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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
11.4 Electric Power
11.3 Resistance, Resistivity, and Ohm’s Law
11.2 Simple Circuits
AdvancedMCQMathematicalConceptual25.4k
A circuit with four identical lightbulbs, an ideal battery \(\mathcal{E}\), and an open switch \(S\).
A circuit with four identical lightbulbs, an ideal battery \(\mathcal{E}\), and an open switch \(S\).
A circuit consists of an ideal battery of electromotive force \(\mathcal{E}\), four identical lightbulbs labeled 1, 2, 3, and 4 each with constant resistance \(R\), and an open switch \(S\), as shown in the diagram. Switch \(S\) is connected in parallel across Bulb 3.

OptionBrightness of Bulb 2Brightness of Bulb 4Potential Difference Across Bulb 1
(A)DecreasesDecreasesIncreases
(B)IncreasesRemains unchangedIncreases
(C)DecreasesIncreasesDecreases
(D)IncreasesDecreasesIncreases

Which row in the table correctly describes the resulting changes in the circuit after switch \(S\) is closed?

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