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Thermodynamics — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsThermodynamics3 Marks
Question
Two thermometers are constructed in the same way except that one has a spherical bulb and the other has an elongated cylindrical bulb. Which one will respond quickly to the temperature changes? Why?
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Answer

Thermometer with the cylindrical bulb. It is because the area of a cylinderical surface is greater than a spherical surface. Therefore, mercury in the cylindrical bulb reaches the temperature of the surrounding earlier.

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