Cathode negative or positive
Then using the half equation stoichiometry, you can find out how many mols of element is made for every e - transferred.
![cathode negative or positive cathode negative or positive](http://i1.ytimg.com/vi/numIwELmj5E/maxresdefault.jpg)
Normally, the electrons would want to flow the other way (or not flow at all).
![cathode negative or positive cathode negative or positive](https://i.redd.it/1tnn8eb832l31.png)
In the diagram above, arrows are shown in red because the battery is forcing the flow of electrons.
![cathode negative or positive cathode negative or positive](https://www.build-electronic-circuits.com/wp-content/uploads/2014/05/LED-anatomy.png)
Thus, no input is required for galvanic/voltaic cells. In contrast, galvanic/voltaic cells already have a positive cell potential.For electrolytic cells, the cell potential is negative, so a potential input greater than the magnitude of the cell potential must be present for electrolysis to occur.The potential/voltage input + the cell potential must be > 0 for the reactions to occur.In contrast, a galvanic cell has in its place either a resistor, or a Voltmeter. On the diagram, this is represented by a battery in the circuit.