A-LevelPhysicsD.C. circuits9702/12 · May/June 2025 · Q361 Mark
The diagram shows a four-terminal box connected to a battery and two ammeters. [Diagram shows a battery connected to Ammeter A, which is connected to terminal 1 of a four-terminal box. Terminal 3 of the box is connected back to the battery. Terminals 2 and 4 are not externally connected in this diagram.] The currents in the two ammeters are identical. Which circuit, within the box, gives this result?
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Acircuit forming a square with resistors between terminals (1,2), (2,3), (3,4), and (4,1).
BTwo independent paths: a resistor between terminals (1,3) and a resistor between terminals (2,4).
Cseries connection: a resistor between (1,2), a direct wire between (2,3), and a resistor between (3,4).
DTwo independent paths: a resistor between terminals (1,3) and a resistor between terminals (2,4).
✓ Correct answer
D: Two independent paths: a resistor between terminals (1,3) and a resistor between terminals (2,4).
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