Final answer:
A copper-constantan thermocouple is used to measure temperature based on the voltage difference across its junction. By comparing the measured voltage with a conversion table, the corresponding temperature can be determined. The specific temperature associated with the given voltage can be found using the appropriate conversion table for a copper-constantan thermocouple.
Step-by-step explanation:
A copper-constantan thermocouple is a device used to measure temperature by exploiting the phenomenon of the Seebeck effect. The Seebeck effect states that the voltage across the junction of two different metals is proportional to the temperature difference between the two junctions. In this case, the copper-constantan thermocouple is connected to copper-constantan extension wires, and the reference junction is exposed to a room temperature of 20 degrees C.
Given that the output voltage measured is 6.537 mV, we can use the voltage-to-temperature conversion table to find the indicated temperature at the hot junction of the thermocouple. The conversion table provides the voltage-temperature relationship for different combinations of metals. By comparing the measured voltage with the table, we can determine the corresponding temperature.
Since the question doesn't specify the exact conversion table used, I cannot provide the specific temperature associated with 6.537 mV. However, using the appropriate table for a copper-constantan thermocouple, you can find the indicated temperature based on the measured voltage.