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Question

Two thermometers are constructed in the same way except that one has a spherical bulb and the other a cylindrical bulb; which one will respond quickly to temperature changes?Spherical bulb thermometereitherCylindrical bulb thermometerboth equally

A
Spherical bulb thermometer
B
Cylindrical bulb thermometer
C
both equally
D
either
Solution
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Solution:1. The flow of heat is proportional to the surface area or area of cross-section.2. We know that, the surface area of a cylindrical bulb is more than that of spherical surface. 3. Therefore, the thermometer with cylindrical bulb responds more quickly to temperature change than the thermometer with spherical bulb.Hece A is the correct option

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