The emf of a battery is measured using a potentiometer wire

Last updated: 6/14/2023

The emf of a battery is measured using a potentiometer wire of length 1m and total resistance 2002 The potentiometer wire is connected across a battery of emf 3V and resistance 0 5 22 If the null point occurs at the potentiometer length 40cm find the emf of the first battery Suggest a method of measurement of the internal resistance using the potentiometer