Physics 9702 · AS & A Level · Errors and uncertainties

Errors and uncertainties — practice question

A digital meter has an accuracy of $\pm 1\%$. It is used to measure the current in an electrical circuit. The meter reading changes between $3.04\ \text{A}$ and $3.08\ \text{A}$. What is the value of the current, with its uncertainty?

  • A$(3.06 \pm 0.02)\ \text{A}$
  • B$(3.06 \pm 0.04)\ \text{A}$
  • C$(3.06 \pm 0.05)\ \text{A}$
  • D$(3.06 \pm 0.07)\ \text{A}$

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