Physics (AS & A Level) · Feb / March 2018 · Paper 12 · Question 34
9702Resistance and resistivity
A wire of resistance 9.55 Ω has a diameter of 0.280 mm. It is made of metal of resistivity 4.90 × 10^–7 Ω m. What is the length of the wire?
- A1.20 m
- B4.80 m
- C19.0 m
- D76.8 m
As printed in the paper
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Correct answer: A. 1.20 m
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