What describes the measure of electrical energy consumed over time?

The measure of electrical energy consumed over time is best described by the kilowatt-hour. This unit quantifies energy usage, specifically in relation to the power consumption of electrical devices over a specified duration. One kilowatt-hour represents the amount of energy consumed by a device that uses one kilowatt of power continuously for one hour.

This makes kilowatt-hour particularly useful in practical settings, such as electricity billing, where consumers are charged for the total energy they use over time. Other options, such as watt, volt, and joule, are important measurements in electrical terms but do not convey the concept of energy consumption over a time period. A watt measures power (the rate of energy usage), a volt measures electrical potential, and a joule quantifies energy but does not factor in the time element essential to understanding energy consumption in real-world scenarios.