17 AB is a potentiometer wire of length 100 cm and

Last updated: 6/25/2023

17 AB is a potentiometer wire of length 100 cm and resistance 10 ohms It is connected in series with a resistance R 40 ohms and a battery of e m f 2 V and negligible internal resistance If a source of unknown e m f E is balanced by 40 cm length of the potentiometer wire the value of E is 1 0 8 V A R wwwwww 12V 40 cm E 1 B 2 1 6 V