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On what thermometric properties are the following based: (i) the thermocouple thermometer and (ii) the mercury-in-glass thermometer? - Leaving Cert Physics - Question c - 2014
Question c
On what thermometric properties are the following based: (i) the thermocouple thermometer and (ii) the mercury-in-glass thermometer?
Worked Solution & Example Answer:On what thermometric properties are the following based: (i) the thermocouple thermometer and (ii) the mercury-in-glass thermometer? - Leaving Cert Physics - Question c - 2014
Step 1
(i) the thermocouple thermometer
Answer
The thermocouple thermometer is based on the thermometric property of electromotive force (emf). This principle relies on the Seebeck effect, which states that a voltage (emf) is generated when there is a temperature difference between the junctions of two different metals.
Step 2
(ii) the mercury-in-glass thermometer
Answer
The mercury-in-glass thermometer is based on the thermometric properties of the expansion of liquids, specifically the change in length or height of mercury within the glass tube. The volume of mercury expands or contracts with temperature changes, allowing for accurate measurements.