The variation of potential difference `V` with length `l` in case of two potentiometers `X` and `Y`
Channel: Doubtnut
Date: 2020-08-02

The variation of potential difference `V` with length `l` in case of two potentiometers `X` and `Y` is as shows in Fig. `6.21`. Which of these two will you perfer for comparing the emfs of the two cells and why ?