Physics (AS & A Level) · May / June 2025 · Paper 12 · Question 36

The diagram shows a four-terminal box connected to a battery and two ammeters. The currents in the two ammeters are identical. Which circuit, within the box, gives this result?

1. ACircuit A: terminals 1 and 3 connected via resistors to 2 and 4 respectively, with 2-4 connected by a wire
2. BCircuit B: terminals 1 and 3 connected via resistors to 2 and 4 respectively, with 1-3 and 2-4 connected by wires
3. CCircuit C: terminal 1 connected via resistor to 2, 3 connected via resistor to 1, and 2-4 connected by a wire
4. DCircuit D: terminal 1 connected via resistor to 3, and 2-4 connected by a wire

As printed in the paper