Cathodic Protection Tester Practice Exam

What unit is current measured in?

1. Ohms

2. Coulombs

3. Volts

4. Amperes

The correct answer is: Amperes

Current is measured in Amperes, often abbreviated as "Amps." The unit of current is defined based on the flow of electric charge, where one ampere corresponds to one coulomb of charge passing through a conductor in one second. This fundamental relationship helps in understanding how much electric charge is flowing and is crucial for evaluating electrical systems, including those dealing with cathodic protection. Understanding current is significant in various electrical and electrochemical applications. It allows engineers and technicians to assess the strength of the cathodic protection systems and ensure that they are effective in preventing corrosion. The other units listed relate to different electrical properties: Ohms are used to measure resistance, Coulombs measure electric charge, and Volts measure electric potential or voltage. Each of these units plays a vital role in electrical theory, but Amperes specifically corresponds to current, making it the correct answer in this context.