4 A potentiometer wire of length L and a resistance r are

Last updated: 6/21/2023

4 A potentiometer wire of length L and a resistance r are connected in series with a battery of e m f E and a resistance r An unknown e m f E is balanced at a length of the potentiometer wire Re AIPMT 2015 The e m f E will be given by LE r 1 r r Er I 1 LE r 2 Tr El 4