The percentage uncertainty in measuring 2.0 mm with a ruler of resolution 1 mm is large because:

  1. the uncertainty is a large fraction of a small reading
  2. the ruler is broken
  3. small lengths can't be measured
  4. mm is not an SI unit
Answer

A) the uncertainty is a large fraction of a small reading

12 100% = 50% — use a more precise instrument. SLO P-11-A-07 · Understanding

Physics MCQ · More Physical Quantities and Measurement MCQs · Practise