Red Seal Electrician Practice
Meters and troubleshootingQuestion 749 of 1506

The temperature of a thermocouple junction rises. What happens to the voltage and to the current in the circuit?

  1. Voltage follows temperature; current also depends on circuit resistance
  2. Both stay fixed whatever the circuit
  3. Current is set by temperature, and the voltage depends on circuit resistance
  4. Both depend only on the colour and the length of the wire
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Correct answer: Voltage follows temperature; current also depends on circuit resistance

The voltage and temperature are in a fixed relation. Current is voltage divided by total circuit resistance.

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

Practice meters and troubleshooting

Questions last reviewed: 18 October 2026