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AP Physics 2
11.6 Kirchhoff’s Loop Rule
11.5 Compound Direct Current (DC) Circuits
11.4 Electric Power
11.3 Resistance, Resistivity, and Ohm’s Law
IntermediateMCQMathematicalProportional Analysis13.4k
Circuit with a real battery and variable external load.
Circuit with a real battery and variable external load.
A battery of electromotive force \(\varepsilon\) and internal resistance \(r\) is connected in series with a variable external resistor of resistance \(R\). In Scenario 1, the variable resistor is set to \(R_1 = r\). In Scenario 2, the variable resistor is adjusted to \(R_2 = 3r\). What is the ratio \(P_2 / P_1\) of the rate of energy dissipation in the external resistor in Scenario 2 to that in Scenario 1?

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