A variable, opposite external potential ( E_ext ) is applied to the cell Zn | Zn^2+(1 M ) ∥ Cu^2+(1 M )| Cu, of potential 1.1 V. When E_ext <1.1 V…

A variable, opposite external potential $\displaystyle \left(\mathrm{E}_{\text {ext }}\right)$ is applied to the cell $\displaystyle \mathrm{Zn}\left|\mathrm{Zn}^{2+}(1 \mathrm{M}) \| \mathrm{Cu}^{2+}(1 \mathrm{M})\right| \mathrm{Cu}$, of potential $\displaystyle 1.1$ V. When $\displaystyle \mathrm{E}_{\text {ext }}<1.1 \mathrm{~V}$ and $\displaystyle \mathrm{E}_{\text {ext }}>1.1 \mathrm{~V}$, respectively electrons flow from :