Which unit measures resistance in an electrical circuit?

The unit that measures resistance in an electrical circuit is the Ohm. Resistance is a fundamental property that quantifies how much a material opposes the flow of electric current. In the context of Ohm's Law, which states that Voltage (V) = Current (I) multiplied by Resistance (R), Ohm serves as the critical unit that describes how much current will flow through a conductor for a given voltage.

Understanding this concept is essential in the field of electrical systems, as it helps in designing circuits, ensuring safety, and optimizing performance. In practical applications, knowing the resistance of a circuit element allows for the determination of how much current will flow through it when a voltage is applied, which is crucial for predicting how circuits will behave under different loads.