A variable, opposite external potential
Question:

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

  1. anode to cathode in both cases 

  2. anode to cathode and cathode to anode

  3. cathode to anode in both cases 

  4. cathode to anode and anode to cathode


Correct Option: , 2

Solution:

Fact

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