JAMB Physics 2006 Question 44

Question 44

Temperature and Thermometers

What is likely to happen if the glass of a thermometer expands more upon heating than the liquid inside?

  1. A.The glass will shrink
  2. B.The liquid will go down in the stem
  3. C.The liquid will rise up in the stem
  4. D.The glass will break
Show the answer and explanation

Answer: B (The liquid will go down in the stem)

Explanation

If the bore of the glass grows faster than the liquid's volume, the liquid fills less of the tube, so its level falls in the stem.