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AP Physics 2
11.5 Compound Direct Current (DC) Circuits
IntermediateMCQConceptual19.9k
Circuit containing a real battery and a variable load resistor.
Circuit containing a real battery and a variable load resistor.
A real battery with electromotive force (emf) \(\varepsilon\) and constant internal resistance \(r\) is connected in series with a variable resistor of resistance \(R\), as shown in the diagram. An experimenter slowly decreases the resistance \(R\), which causes the current \(I\) in the circuit to increase. Which of the following statements correctly describes what happens to the terminal voltage across the battery and provides the correct justification?

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