A-LevelPhysicsElectricity9702/12 · May/June 2022 · Q341 Mark

An iron wire has length 8.0 m and diameter 0.50 mm. The wire has resistance R. A second iron wire has length 2.0 m and diameter 1.0 mm. What is the resistance of the second wire?

AR / 16

BR / 8

CR / 2

✓ Correct answer

A: R / 16

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Topic: Electricity, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2022 Paper 1 Variant 2, question 34.

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