How is current flow measured in electrical theory?

Current flow in electrical theory is measured in Amperes, often abbreviated as "A." The Ampere is defined as the flow of one coulomb of charge per second. In simple terms, it quantifies the number of electric charges (typically electrons) flowing past a specific point in a circuit per unit of time.

When an electric current flows, it essentially represents the movement of these charged particles, and the Ampere provides a standardized way to express this flow. Therefore, understanding current in terms of Amperes is crucial for assessing the capacity of electric circuits and components, as it affects their performance and safety.

The other terms, while related to electrical concepts, measure different properties: Joules measure energy, Volts measure electrical potential or voltage, and Coulombs measure the quantity of electric charge. Thus, these units serve distinct functions within the domain of electricity, but the measurement of current specifically aligns with the definition of the Ampere.