🔍 Key Concepts

• Thermocouple output behavior when multiple junctions are at different temperatures • Difference between series-aiding, series-opposing, and parallel connections for thermocouples • How to get an output proportional to an average rather than to just one point

💭 Think About

• Ask what happens to the total emf if you place several thermocouples in line so that each one’s voltage adds to the next versus subtracts from it • Consider whether connecting thermocouples in parallel changes voltage or current, and which quantity you actually measure in a thermocouple circuit • Think about how you could arrange multiple junctions so that the net voltage reflects the combined (averaged) temperature of all measured points

✅ Before You Answer

• Verify which wiring method makes the individual emf contributions add together rather than cancel or stay the same • Check whether dividing by the number of thermocouples is a real electrical effect or just a way of thinking about the result • Eliminate any option where the wiring would cause cancellation of voltages instead of reinforcement across the duct