What is the practical unit of electrical current?

The practical unit of electrical current is the Ampere. It is a standard unit that measures the flow of electric charge in a circuit. Specifically, one Ampere is defined as the flow of one coulomb of charge per second. This is essential in understanding how much electricity is flowing through a circuit, which can help in designing and analyzing electrical systems.

In practical applications, knowing the amount of current flowing allows engineers and technicians to ensure that wiring and components are suitable for the amount of electricity they will carry, preventing overheating and potential failures. The Ampere serves as a fundamental building block in electrical measurements, facilitating various calculations involving power and resistance.

While voltage is the measure of electric potential difference and Ohm is a unit of resistance, Coulomb refers to the quantity of charge. None of these terms specifically represent the flow of current itself as the Ampere does. Thus, Ampere is the correct answer as it directly quantifies the current in electrical circuits used in both theory and practical applications.