What is the unit of resistance?

The unit of resistance is the ohm, which is denoted by the Greek letter Omega (Ω). Resistance measures how much an object opposes the flow of electric current. According to Ohm's Law, resistance (R) is defined as the voltage (V) across a conductor divided by the current (I) flowing through it: R = V/I. This fundamental relationship illustrates the role of resistance in electrical circuits.

Understanding the units of electrical measurements is crucial. The volt is a unit of measurement for electric potential or voltage, the watt measures electric power (the rate of doing work), and the ampere measures the flow of electric current. However, the specific measurement of resistance is captured by the ohm. Thus, when considering electrical properties, it’s important to recognize how these units interact with one another to describe the behavior of electrical circuits.