An iron strip AC and a copper strip AB are connected together at A . The junction A is kept at 0^ C , while the free ends B and C are held at 100^ C . A potential difference exists between

Step-by-step solution

Due to the Seebeck effect, a potential difference (thermo-emf) exists between the free ends B and C of the two dissimilar metals (iron and copper) because the junction A is at 0^ C and the free ends are at 100^ C . Due to the Thomson effect, a potential difference exists across the ends of a single conductor if there is a temperature gradient along its length. Since end A is at 0^ C and ends B and C are at 100^ C , a potential difference exists between the two ends of the copper strip ( A and B ) and between the tw