A thermocouple can:

A thermocouple can:

• A. Generate a small DC current
• B. Generate a large AC voltage
• C. Act as a resistor
• D. Store energy

Answer: (A)

A thermocouple works by converting a temperature difference into electricity through the Seebeck effect, so it acts like a small DC voltage source. In a circuit, that voltage can push current, so it’s reasonable to say it can generate a small DC current in a closed loop. It doesn’t inherently produce large AC voltage—the output is a small, usually DC, voltage unless specific circuitry or temperature cycling creates AC behavior. It’s not a resistor and it doesn’t store energy; it’s a heat-to-electricity transducer, not a passive resistive element or a storage device.

A thermocouple works by converting a temperature difference into electricity through the Seebeck effect, so it acts like a small DC voltage source. In a circuit, that voltage can push current, so it’s reasonable to say it can generate a small DC current in a closed loop. It doesn’t inherently produce large AC voltage—the output is a small, usually DC, voltage unless specific circuitry or temperature cycling creates AC behavior. It’s not a resistor and it doesn’t store energy; it’s a heat-to-electricity transducer, not a passive resistive element or a storage device.