One junction of a certain thermoelectric couple is at a fixed temperature T_r and the other junction is at temperature T . The thermo-electromotive force for this is expressed by E=k (T-T_r ) [T₀- 1 2 (T+T_r ) ] . At temperature T= 1 2 T₀ ,

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One junction of a certain thermoelectric couple is at a fixed temperature T_r and the other junction is at temperature T . The thermo-electromotive force for this is expressed by E=k (T-T_r ) [T₀- 1 2 (T+T_r ) ] . At temperature T= 1 2 T₀ , the thermoelectric power is

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Correct answer: A. 1 2 k T₀

We know that thermoelectric power S= d E d T Given, E=K (T-T_r ) [T₀- 1 2 (T+T_r ) ] By differentiating the above equation w.r.t. T and putting T= 1 2 T₀ , we get S= 1 2 k T₀

One junction of a certain thermoelectric couple is at a fixed temperature T_r and the other junction is at temperature T . The thermo-electromotive force for this is expressed by E=k (T-T_r ) [T₀- 1 2 (T+T_r ) ] . At temperature T= 1 2 T₀ , the thermoelectric power is

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