Physics Heating and Chemical Effect of Current Thermo - Electricity, Thermal Conductivity, Thermocouple Single Correct MCQ
Published on: September 12, 2026

For a thermocouple, the temperature of inversion is that temperature at which thermo e.m.f. is

A
Zero
B
Maximum
C
Minimum
D
None of the above

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Text Solution

Verified by Experts
The correct answer is:
A
In a thermocouple, the thermoelectric potential (thermo e.m.f.) generated is affected by the temperature difference between the two junctions of dissimilar metals. The temperature of inversion is the temperature point at which the direction of the thermo e.m.f. reverses. At this temperature, the thermoelectric voltage becomes zero, indicating no net e.m.f. generated.
Therefore, at the temperature of inversion, the thermo e.m.f. is zero.

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