In the SI metric system, which unit is used to measure electrical resistance?

The unit used to measure electrical resistance in the SI metric system is the ohm. This is a fundamental unit of measurement defined as the amount of resistance that allows one ampere of current to flow through an electrical circuit when one volt of electrical potential is applied.

Understanding this unit is essential because it helps electrical professionals like those in the IBEW apprenticeship to assess how much opposition materials present to the flow of electric current, which is vital for safe and effective electrical installation and troubleshooting.

The concept of resistance is part of Ohm's Law, which relates voltage, current, and resistance in electrical circuits, reinforcing the importance of the ohm in electrical applications.