Readings are taken while loading and unloading to:

  1. check the wire stays within its elastic limit
  2. measure the diameter
  3. save time
  4. increase the extension
Answer

A) check the wire stays within its elastic limit

Readings should agree if deformation is elastic. SLO P-11-B-25 · Understanding

Physics MCQ · More Deformation of Solids MCQs · Practise