PHYSICS

JAMB 2008 - Question 19

Physics 2008 JAMB Past Questions - Question 19: The thermometric property of a thermocouple is the change in

Choose the correct answers from the options given.
The thermometric property of a thermocouple is the change in
A:
B:
C:
D:
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Correct Answer

B

Explanation

Temperature difference between hot and cold junctions of thermocouple is proportional to the emf. GeneratedThe thermometric property of a thermocouple is the change in electrical voltage (emf or electromotive force) that it generates in response to a change in temperature. A thermocouple is a temperature sensor that consists of two different types of metal wires joined at one end. When there is a temperature difference between the junction where the two wires meet and the free ends of the wires, a voltage is generated. This voltage is directly proportional to the temperature difference and can be measured to determine the temperature at the junction. The relationship between the voltage generated by a thermocouple and the temperature difference is defined by the Seebeck effect, which varies depending on the specific type of thermocouple used. Different types of thermocouples are designed for various temperature ranges and applications.