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Physics (AS & A Level) · Feb / March 2021 · Paper 12 · Question 5

9702Errors and uncertainties

A student measures the current and the potential difference for a resistor in a circuit. current = (50.00 ± 0.01) mA potential difference = (500.0 ± 0.1) mV The measurements are used to calculate the resistance of the resistor. What is the percentage uncertainty in the calculated resistance?

  1. A0.0002%
  2. B0.0004%
  3. C0.02%
  4. D0.04%

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Correct answer: D. 0.04%

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