Meters and troubleshootingQuestion 754 of 1506

Two thermocouple junctions are connected in opposition. What does the output voltage show?

  1. The temperature difference between the two junctions
  2. The ambient air temperature only
  3. The average value of the temperatures of the two junctions
  4. The highest temperature
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Correct answer: The temperature difference between the two junctions

The opposed voltages subtract, so the net is proportional to the difference.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 9.5: Thermocouples

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Questions last reviewed: 18 October 2026