Light bulb circuit analysis · PhysicsBowl 2013 #38

Physics · electromagnetism

Problem

Five identical light bulbs are connected into a circuit as shown. All wires are ideal with no resistance, and the ideal battery has emf ε\varepsilon. When the switch S in the circuit is closed, aside from bulb #5, which of the other bulbs brighten? [Figure: Shows circuit with 5 light bulbs and a switch] (A) Only Bulb #4 (B) Only Bulbs #1 and #3 (C) Only Bulbs #3 and #4 (D) Only Bulbs #2, #3, and #4 (E) Only Bulbs #1, #3, and #4

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