Carbon fibres in concrete allow bridge inspectors to check reliability because:

  1. the fibres glow when cracked
  2. the fibres conduct electricity, and cracks change their resistance
  3. they are magnetic
  4. they make the concrete transparent
Answer

B) the fibres conduct electricity, and cracks change their resistance

Electrical monitoring. SLO P-09-E-27 · Understanding

Physics MCQ · More Current Electricity MCQs · Practise