$A$ 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 $E_{ext} < 1.1 \ V$ and $E_{ext} > 1.1 \ V$,respectively,electrons flow from:
- Aanode to cathode in both cases
- Bcathode to anode and anode to cathode
- Canode to cathode and cathode to anode
- Dcathode to anode in both cases
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