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A Level Physics — Electricity · MediumQuestion
A student carries out an experiment to determine the resistivity of a metal wire. She determines the resistance from measurements of potential difference between the ends of the wire and the corresponding current. She measures the length of the wire with a ruler and the diameter of the wire using a micrometer. Each measurement is made with an uncertainty of 1% Which measurement gives the largest uncertainty in the calculated value of the resistivity?
- A. current
- B. diameter
- C. length
- D. potential difference
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A Level Physics — ElectricityAnswer
Correct answer
B. diameter
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