In electrical terms, what is a measurement of resistance called?

A measurement of resistance in electrical terms is known as an ohm. The concept of resistance is fundamental in understanding how electrical circuits operate. Resistance quantifies how much a material opposes the flow of electric current. An ohm is defined as the amount of resistance that allows one ampere of current to flow through a circuit when one volt is applied across it. This unit is named after the German physicist Georg Simon Ohm, who formulated Ohm's Law, which relates voltage, current, and resistance.

In contrast, a volt is a unit of electric potential or electromotive force, a watt is a unit of power that quantifies the rate of energy transfer, and a joule is a unit of energy. Each of these units serves a specific purpose within electrical science, but none measure resistance directly. Understanding these distinctions is essential for grasping basic electrical principles and their applications in medical aesthetics and beyond.