Physics 9702 · AS & A Level · Errors and uncertainties

Errors and uncertainties — practice question

A digital meter is being used to determine the current in an electric circuit. Its reading varies between $3.04\,\text{A}$ and $3.08\,\text{A}$. The meter readings are accurate to $\pm1\%$. What is the current’s true value, including 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$(3.06 \pm 0.07)\,\text{A}$

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI