A-LevelPhysicsElectricity9702/12 · May/June 2013 · Q321 Mark

A power cable has length 2000m. The cable is made of twelve parallel strands of copper wire, each with diameter 0.51 mm. What is the resistance of the cable? (resistivity of copper = 1.7 × 10⁻⁸ Ω m)

A0.014 Ω

B3.5 Ω

C14 Ω

D166 Ω

✓ Correct answer

C: 14 Ω

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Topic: Electricity, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2013 Paper 1 Variant 2, question 32.

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