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AP Physics C: E&M
11.6 Kirchhoff’s Loop Rule
11.5 Compound Direct Current Circuits
11.2 Simple Circuits
BeginnerMCQMathematicalConceptual24.2k
Circuit with two opposing batteries and a resistor.
Circuit with two opposing batteries and a resistor.
A circuit consists of a single loop containing two nonideal batteries and an external resistor of resistance \(R = 4.0\text{ }\Omega\), as shown. Battery 1 has an emf \(\mathcal{E}_1 = 18\text{ V}\) and internal resistance \(r_1 = 1.0\text{ }\Omega\). Battery 2 has an emf \(\mathcal{E}_2 = 6.0\text{ V}\) and internal resistance \(r_2 = 1.0\text{ }\Omega\). What is the magnitude of the terminal potential difference across Battery 2?

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