Emf of the cell , ξ1 = 1.25 V
Balancing length of the cell, l1 = 35 cm = 35 x 10-2 m
Balancing length after interchanged, l2 = 63 cm = 63 x 10-2 m
Emf of the cell1, ξ2 = ?
The ration of emf’s, \(\frac{ξ_1}{ξ_2}\) = \(\frac{l_2}{l_1}\)
The ration of emf’s, ξ2 = ξ1 = \((\frac{l_2}{l_1})\)