For the process of electrolysis, what is essential?
1
The applied (used) voltage must be zero.
2
For that electrolysis, the value of the voltage applied (used) must be equal to the electromotive force (emf) past the electrolysis.
3
For that electrolyte to be applied, the value of the applied voltage must be less than the emf past the electrolysis.
4
For that electrolyte to be applied, the value of the applied (used) voltage must be greater than the electro-carrying force (emf) past the electrolysis.