To reduce the most significant uncertainty in a wire's diameter, you should:

  1. use a micrometer and average several readings along the wire
  2. use a metre rule
  3. estimate by eye
  4. measure once
Answer

A) use a micrometer and average several readings along the wire

Better instrument and repeats. SLO P-11-N-26 · Understanding

Physics MCQ · More Experimental Skills and Data Analysis MCQs · Practise