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Which outcome occurs when exceeding temperature limits during a thermoelectric cycle?

A)Reverse current flow develops suddenly
B)Maximum power efficiency is increased
C)Seebeck coefficient irreversibly degrades slowly
D)Peltier cooling switches to heating

💡 Explanation

Exceeding temperature limits initiates material degradation, therefore reducing the Seebeck coefficient, because increased thermal stresses disrupt carrier mobility and cause changes due to diffusion, rather than changes in power which is affected by thermal resistance.

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