Cathodic Protection Tester Practice Exam

What is the current flow between anode and cathode called?

1. Electrolytic current flow

2. Conventional current flow

3. Direct current flow

4. Ion current flow

The correct answer is: Electrolytic current flow

The current flow between an anode and a cathode in electrochemical processes is referred to as electrolytic current flow. This flow occurs in an electrolyte, which is a medium that facilitates the movement of ions, allowing for the electrochemical reactions that take place at the anode and cathode. In this context, the term "electrolytic" is central, as it directly describes the environment and the nature of the current flow during electrolysis, where the electrodes are submerged in an ionic solution. Conventional current flow typically describes the direction of positive charge movement, which may not accurately capture the specifics of the movement of electrons or ions in an electrochemical context. Direct current flow refers broadly to any unidirectional flow of electric charge, which includes electrochemical processes but does not specifically highlight the involvement of electrolyte and ions. Ion current flow suggests a movement of ions, which is indeed part of the electrolytic process; however, it does not fully encompass the concept of current as it is typically defined in electrochemical terms. Thus, electrolytic current flow is the most appropriate descriptor for the current that exists between anode and cathode within an electrolyte, distinguishing it from more general forms of current flow and providing a clear link to the electrochemical