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 casesĀ 

  2. anode to cathode and cathode to anode

  3. cathode to anode in both casesĀ 

  4. cathode to anode and anode to cathode


Correct Option: , 2

Solution:

Fact

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