explain the working principle of the thermometer
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The working principle of thermometer is based on thermal expansion.
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Thermometer makes use of some measurable property (called thermometric property) offer substance which changes linearly with temperature.
Thermometric properties of different substance and corresponding thermometer are as follows:-)
1. Length of liquid column in capillary .
2. Pressure of a gas at constant volume.
3. Volume of a gas at constant pressure.
4. Electrical resistance of a metal wire.
5. Thermoelectrical e.m.f.
6.Radiated power.
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