Answer :

The copper strip AB and an iron strip AC are joined at A and the junction A is maintained at 0°C and the free ends B and C are maintained at 100°C as shown in fig.


Due to Seebeck effect, there will be generation of thermo-emf between the points that are at different temperatures.


Here, all junctions and ends are at different temperatures, i.e., the two ends of the copper, the copper end and the iron end at the junction, the two ends of the iron strip and the free ends B and C are at different temperatures.


Hence, a potential difference exists among them.

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