Meters and troubleshootingQuestion 751 of 1506

What is a thermopile?

  1. A meter that reads the temperature of the room in degrees Celsius
  2. A thermocouple that is connected directly to a motor winding
  3. Thermocouple junctions connected in series to produce electrical power
  4. A single junction in a metal furnace
Show answer

Correct answer: Thermocouple junctions connected in series to produce electrical power

Many junction pairs add their voltages when one set is heated and the other is cooled.

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

Practice meters and troubleshooting

Questions last reviewed: 18 October 2026