Why is a power supply used between a cathode and anode?

Related Questions

Define electrolysis What happens during the process of electrolysis? When is electrolysis used? What is a cathode? What is an Anode? When are cathodes and anodes used? What is the difference between a cathode and an anode? What kind of power supply is used between a cathode and anode? What electrode are metals deposited at during electrolysis? What products are made when molten zinc chloride goes through electrolysis? What is the difference between reduction and oxidisation? how can you tell if oxidisation or reduction is taking place? Why does aluminium oxide dissolve in molten cryolite? Why will carbon electrodes need to replaced sometimes? What are hydrogen fuel cells? What is the chemical reaction for a hydrogen fuel cell? What is the outcome of this reaction? Why are the outcomes significant as a technology? What is the outcome of the reaction with hydrogen fuel cells? Why is the technology of hydrogen fuel cells significant? What is an electrolyte? How is hydrogen produced from the process of electrolysis?