Multiple choice

If a bimetallic strip is heated, it will

  1. not bend at all

  2. bend towards the metal with lower thermometer expansion coefficient

  3. twist itself into a helix

  4. bend towards the metal without expansion

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A bimetallic strip bends when heated because the two metals expand at different rates - it bends toward the metal with lower thermal expansion.