DC circuitsQuestion 768 of 1506

Five identical 2 V cells, each with 0.25 Ω of internal resistance, are connected in parallel. What are the battery voltage and the equivalent internal resistance?

2 V and 1.25 Ω
10 V and 1.25 Ω
10 V and 0.05 Ω
2 V and 0.05 Ω

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Correct answer: 2 V and 0.05 Ω

Parallel cells keep the same voltage. The resistance is divided by the number of cells: 0.25 Ω / 5 = 0.05 Ω.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 11.2: Battery Construction

Questions last reviewed: 18 October 2026

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