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The length of a mercury column in a merc...

The length of a mercury column in a mercury-in-glass thermometer is 25 mm at the ice point and 180 mm at the steam point. What is the temperature when the length is 60 mm?

Text Solution

Verified by Experts

Here the thermometric property P is the length of the mercury column. Using Eq. (7.2), we get
`T= (100 ( 60-25))/((180-25)) = 22.58 ^@ C`
Resistance thermometer uses the change of electrical resistance of a metal wire with temperature. It measures temperature accurately in the range -`2000^@ C` to `1200^@ C` but it is bulky and is best for steady temperatures.
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