Physics 9702 · AS & A Level · Errors and uncertainties

Errors and uncertainties — practice question

For a resistor, the power loss $P$ is given by $P = \frac{V^2}{R}$. The percentage uncertainty in the potential difference $V$ is $3\%$ and the percentage uncertainty in the resistance $R$ is $2\%$. What percentage uncertainty does $P$ have?

  • A4%
  • B7%
  • C8%
  • D11%

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