Physics Heating and Chemical Effect of Current Thermo - Electricity, Thermal Conductivity, Thermocouple Single Correct MCQ
Published on: September 11, 2026

Thermocouple is a device for the measurement of

A
Absolute temperature of a metal
B
The temperature difference between two substances
C
The couple acting on a wire
D
Thermal conductivity of a substance

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Text Solution

Verified by Experts
The correct answer is:
B
A thermocouple measures the temperature difference between two junctions.
Step 1: Understand that a thermocouple consists of two different metals joined at one end.
Step 2: When the junction is heated, it generates a voltage that is proportional to the temperature difference between the hot junction and the cold junction.
Step 3: The device is commonly used to measure temperature differences rather than absolute temperatures or other properties.
Therefore, the correct answer is B.

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