What is the unit of measurement for electrical resistance?

The unit of measurement for electrical resistance is the Ohm. This unit is defined as the resistance between two points in a conductor when a constant potential difference of one volt applied across those points results in a current of one ampere. Essentially, it quantifies how strongly a material opposes the flow of electric current. Understanding this concept is crucial for analyzing electrical circuits and ensuring they function correctly, as resistance affects how much current can flow for a given voltage.

The other options represent distinct electrical concepts: the Volt measures electric potential or voltage, the Ampere quantifies electric current, and the Watt represents electrical power, which is the rate at which energy is transferred. While all these units are interrelated in the study of electricity and electrical engineering, only the Ohm specifically denotes resistance.