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Questions  

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 quicker to temperature change ?

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By Expert Faculty of Sri Chaitanya
a
spherical bulb thermometer
b
cylindrical bulb thermometer
c
both equally
d
either of any option

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detailed solution

Correct option is B

For a given volume, a cylinder has more surface area than a sphere. As rate of heat conduction is proportional to surface area, the thermometer with cylindrical bulbresponds more quickly.
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