In the thermoelectric method, what is produced by converting heat into electricity?

• A. Power is generated through mechanical energy.
• B. Heat into electricity.
• C. Chemical energy is stored.
• D. Electrical energy is converted into sound.

Answer: (B)

The thermoelectric method converts heat directly into electrical energy. A temperature difference across a thermoelectric material creates a voltage via the Seebeck effect, causing current to flow in an external circuit and delivering electrical power. This is different from generating power from mechanical energy, storing chemical energy, or turning electrical energy into sound. In practice, thermocouples made from p-type and n-type materials are arranged to maximize the voltage from the temperature gradient, illustrating that heat is the source being transformed into electricity.