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← ScienceWhich operational limit is imposed by Carnot's theorem on a thermoelectric generator converting heat into electricity?
A)Maximum efficiency dependent on temperature difference✓
B)Minimum electrical power dictated by material properties
C)Peak current restricted by Seebeck coefficient
D)Operational lifetime limited by thermal cycling
💡 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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