The temperature at which thermo-emf is zero i | vedclass

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Question

(A) In a thermocouple,the thermo-emf $(E)$ varies with the temperature difference between the hot junction $(T_h)$ and the cold junction $(T_c)$.$1$.

Vedclass · Accepted Answer

Temperature of inversion

Vedclass · Answer

(A) In a thermocouple,the thermo-emf $(E)$ varies with the temperature difference between the hot junction $(T_h)$ and the cold junction $(T_c)$.$1$. The thermo-emf is zero when $T_h = T_c$ (the junctions are at the same temperature).$2$. The thermo-emf is also zero when $T_h = T_i$,where $T_i$ is the temperature of inversion.$3$. Since the question asks for the temperature at which thermo-emf is zero,and the temperature of inversion is the specific temperature (other than the cold junction temperature) where the emf vanishes,the correct answer is the temperature of inversion.

The temperature at which thermo-emf is zero is

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