Assertion (A): Rapidly changing temperatures | vedclass

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(A) thermocouple consists of two junctions of dissimilar metals. Because the junctions are very small,their thermal capacity (mass $	imes$ specific h

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Both $(A)$ and $(R)$ are true and $(R)$ is the correct explanation of $(A)$

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(A) thermocouple consists of two junctions of dissimilar metals. Because the junctions are very small,their thermal capacity (mass $	imes$ specific heat) is extremely low. Thermal capacity determines how much heat is required to change the temperature of an object. Since the thermal capacity is very small,the junction can quickly gain or lose heat to reach thermal equilibrium with the surrounding environment. This allows the thermocouple to respond rapidly to changes in temperature. Therefore,both $(A)$ and $(R)$ are true,and $(R)$ is the correct explanation of $(A)$.

Assertion $(A)$: Rapidly changing temperatures can be measured by thermocouples.
Reason $(R)$: The thermal capacity of the junction of a thermocouple is very small.

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Assertion $(A)$: Rapidly changing temperatures can be measured by thermocouples.Reason $(R)$: The thermal capacity of the junction of a thermocouple is very small.