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In which of the following devices is the thermal expansion considered a disadvantage?

Physics
WAEC 2024

In which of the following devices is the thermal expansion considered a disadvantage?

  • A. Fire alarm
  • B. Thermostat
  • C. Bimetallic thermometer
  • D. Balance wheel of a watch
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Correct Answer: Option D
Explanation

Thermal expansion can affect accuracy and timekeeping in a watch's balance wheel, making it disadvantageous in this application.


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