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O Levels Physics (5054)•5054/12/M/J/22
Question 19 from 5054/12/M/J/22

Explanation

Thermometer sensitivity and range unchanged due to insufficient details

Steps:

  • Sensitivity measures height rise per degree Celsius, determined by liquid expansion volume divided by capillary cross-sectional area.
  • Range is total temperature span fitting the capillary length, inversely proportional to sensitivity.
  • No differences specified between new and old thermometers (e.g., bulb size, bore diameter).
  • With capillary length unchanged and no other modifications, both sensitivity and range remain identical.

Why B is correct:

  • Not applicable; lacks supporting evidence from physics principles like thermal expansion formula ΔV = γ V ΔT.

Why the others are wrong:

  • A: No indication of changed bore size to alter sensitivity or range.
  • C: Matches scenario, but question ambiguity prevents confirmation.
  • D: Identical to B; impossible with same length and sensitivity per range = L / S formula.

Not enough information.

Final answer: Not enough information.

Topic: Thermal expansion of solids, liquids and gases

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