216 To compare the emfs of two primary cells and e in the

Last updated: 6/24/2023

216 To compare the emfs of two primary cells and e in the given circuit of potentiometer first balance point is obtained for E cell in the circuit only for length 1 x 1 1 Now balance point obtained again for the cell of emf only for length 12 B x 1 From Eqs i and ii 12 1 In the figure a long uniform potentiometer wire AB is having a constant potential gradient along its length The null points of the two primary cells of emfs and E connected in the manner shown are obtained at a distance of 120 cm and 300 cm from the end A E The value of will be 62