A potentiometer is used to investigate two cells. At the balance point, cell $X$ has a reading of $44\,\text{cm}$ and cell $Y$ has a reading of $70\,\text{cm}$. Which statement is not correct?
- AA potentiometer balance point results in zero current through the galvanometer.
- BAt the balance point, the current through resistor $R$ in both circuits is the same.
- CThe electromotive force (e.m.f.) of cell $X$ is larger than that of cell $Y$.
- DThe value of the e.m.f. of each of the cells $X$ and $Y$ is less than $6\,\text{V}$.