You are given two sets of potentiometer circuit to measure the emf E1 of a cell.
Set A: consists of a potentiometer wire of a material of resistivity p1, area of cross section A1 and length l.
Set B: consists of a potentiometer of two composite wires of equal lengths l/2 each, of resistivity p1, p2 and area of cross section A1 ,A2 resp.
Compare the balancing length obtained in thw two sets.
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