Which unit is used to measure electrical resistance?

The unit used to measure electrical resistance is Ohms. This unit is a fundamental component of Ohm's Law, which states that the voltage (in volts) across a conductor between two points is directly proportional to the current (in amperes) flowing through it, with resistance (in ohms) as the proportionality constant. Understanding resistance is crucial in the field of electrical engineering, as it determines how much current will flow in a circuit when a voltage is applied.

Resistance is a measure of how much a material opposes the flow of electric current, and is an essential factor in designing and analyzing electrical circuits. The higher the resistance, the less current will flow for a given voltage, and vice versa. Thus, Ohms serve as the standard unit to quantify this characteristic in electrical components, providing clarity and uniformity in electrical measurements and calculations.

In this context, the other units listed serve different purposes: Volts measure electrical potential, Amperes measure electrical current, and Watts measure electrical power. Each of these units plays a critical role in electrical systems but does not specifically measure resistance.