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AP Physics 2
11.6 Kirchhoff’s Loop Rule
11.5 Compound Direct Current (DC) Circuits
11.3 Resistance, Resistivity, and Ohm’s Law
AdvancedMCQGraphicalMathematicalConceptual22.2k
Graph of terminal voltage \(\Delta V\) versus current \(I\) for the battery.
Graph of terminal voltage \(\Delta V\) versus current \(I\) for the battery.
A student investigates the electrical properties of a battery by measuring its terminal voltage \(\Delta V\) as a function of the current \(I\) delivered by the battery, producing the linear graph shown. The same battery is subsequently connected in series with a resistor \(R_1 = 3.0\text{ }\Omega\) and a parallel network consisting of a resistor \(R_2 = 6.0\text{ }\Omega\) and an unknown resistor \(R_x\). In this new circuit configuration, the battery delivers a total current of \(3.0\text{ A}\). Based on the graph and this measurement, what is the resistance of \(R_x\)?

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