The thermometric properties of a thermocouple is the change in?
Answer Details
The thermometric properties of a thermocouple refer to the change in the electromotive force (EMF) that the thermocouple produces when exposed to different temperatures.
A thermocouple consists of two wires made of different metals that are joined together at both ends to form two junctions. When one junction is exposed to a higher temperature than the other, a temperature difference is created, which generates a voltage or electromotive force (EMF) across the two junctions.
The amount of EMF generated by a thermocouple is directly proportional to the temperature difference between the two junctions. Therefore, by measuring the EMF produced by a thermocouple, we can determine the temperature difference and hence the temperature at the hot junction.
In summary, the thermometric properties of a thermocouple are related to the change in the electromotive force it produces when exposed to different temperatures. Therefore, the correct answer is "electromotive force".