Which operational limit is imposed by Carnot's theorem on a thermoelectric generator converting heat into electricity?

💡 Explanation

Carnot's theorem dictates the maximum possible efficiency of any heat engine, including thermoelectric generators, which is dependent on the temperature difference between the hot and cold reservoirs; the larger increase yields higher efficiency. Therefore, temperature difference limits efficiency, rather than power, current or lifespan which instead depend on material design or operating conditions.

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