A-LevelPhysicsElectricity9702/12 · Feb/Mar 2022 · Q321 Mark
A piece of wire has a length of 0.80 m and a diameter of 5.0 × 10⁻⁴ m. The I–V characteristic of the wire is shown. [Figure 32.1] What is the resistivity of the metal from which the wire is made?
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A1.2 × 10⁻⁷ Ω m
B1.6 × 10⁻⁶ Ω m
C4.9 × 10⁻⁷ Ω m
D2.0 × 10⁻⁸ Ω m
✓ Correct answer
C: 4.9 × 10⁻⁷ Ω m
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