In the potentiometer arrangement shown the driving cell D

Last updated: 6/10/2023

In the potentiometer arrangement shown the driving cell D has emf and internal resistance r The cell C whose emf is to be measured has emf E 2 resistance 2r The potentiometer wire is 100 cm long If balanced is obtained the length AJ l a l 50 cm l 50 cm c d and internal A balance will be obtained only if resistance of AB is r s r balance cannot be obtained D r DIH dh E 2r J