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AP Physics 2
11.5 Compound Direct Current (DC) Circuits
11.4 Electric Power
11.3 Resistance, Resistivity, and Ohm’s Law
AdvancedMCQMathematicalConceptual25.1k
A clear schematic diagram of an electric circuit. A DC voltage source labeled V_0 is located on the left vertical wire, with its positive terminal at the top. From the top of the source, a horizontal wire runs to the right and splits at a junction into two parallel vertical branches. The left branch contains a circle with an internal looped filament, representing a lightbulb, labeled Bulb 1. The right branch contains an identical lightbulb symbol, labeled Bulb 2. The two branches rejoin at a bottom junction, which connects via a horizontal wire back to the negative terminal at the bottom of the DC source. No other labels, lines, text, or axes appear.
Bulbs 1 and 2 connected in parallel across DC voltage source V0.
Two lightbulbs, Bulb 1 and Bulb 2, are designed to operate at the same standard potential difference \(V_0\). Bulb 1 has a higher power rating than Bulb 2 (\(P_1 > P_2\)) when operated individually at \(V_0\). The two bulbs are connected in parallel across a power supply maintaining a constant potential difference \(V_0\), as shown in the schematic diagram. Which of the following correctly compares the current \(I_1\) through Bulb 1 to the current \(I_2\) through Bulb 2, and provides the correct physical justification for why Bulb 1 dissipates more power than Bulb 2 in this parallel configuration?

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