In a potentiometer circuit two wires of same material of

Last updated: 6/27/2023

In a potentiometer circuit two wires of same material of resistivity one of radius of cross section a other of radius of cross section 2a are joined in series They are of length L 2L respectively This combination acts as the potentiometer wire of length 3L The emf of the cell in the primary circuit is e internal resistance is pl 27a This cell is connected to the potentiometer wire by a conducting wire of negligible resistance with positive terminal of the cell connected to one end call it A of longer wire Find the balancing length measured from point A obtained in measurement of emf of cell of emf 2 L OL 2 2L 5