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AP Physics 2
11.7 Kirchhoff’s Junction Rule
11.3 Resistance, Resistivity, and Ohm’s Law
11.1 Electric Current
IntermediateMCQConceptual23.5k
A schematic diagram showing a single-loop circuit containing an ideal battery connected to two cylindrical wires attached end-to-end in series. Wire 1 on the left is narrower and labeled 'Wire 1 (resistivity \(\rho_1\), area \(A_1\))'. Wire 2 on the right is wider and labeled 'Wire 2 (resistivity \(\rho_2\), area \(A_2\))'. A clockwise directional arrow indicates the flow of conventional current around the loop. No other text or labels appear.
Two distinct wires connected in series with an ideal battery.
Two cylindrical wires, Wire 1 and Wire 2, are made of different conductive materials such that Wire 1 has a lower resistivity and a smaller cross-sectional area than Wire 2. The two wires are connected end-to-end in series with an ideal battery to form a complete DC circuit operating at steady state. How does the electric current \(I_1\) in Wire 1 compare to the electric current \(I_2\) in Wire 2, and what physical principle justifies this comparison?

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