A-LevelPhysicsD.C. circuits9702/12 · Oct/Nov 2017 · Q371 Mark

The circuit shown contains a resistor S that is neither in series nor in parallel with the other resistors. [Figure showing a complex circuit diagram with a 12.0 V source, various resistors, and current values including 3.0 A, 4.0 A, 0.5 A, and 0.50 Ω] Kirchhoff's laws can be used with the data in the diagram to deduce the resistance of each of the two identical resistors labelled R. What is the resistance of each resistor R?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

A3.0 Ω

B4.0 Ω

C4.8 Ω

D5.0 Ω

✓ Correct answer

B: 4.0 Ω

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2017 Paper 1 Variant 2, question 37.

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