How is electrical energy consumption typically expressed?

Electrical energy consumption is typically expressed in kilowatt-hours (kWh) because this unit measures the amount of electricity used over a specific period. A kilowatt-hour represents the energy consumed when a device with a power rating of one kilowatt operates for one hour. This measurement is especially useful for consumers and utility companies, as it helps quantify and bill for electricity usage effectively.

In contrast, amperes indicate the flow of electric current, volts represent electric potential or voltage, and ohms measure resistance in an electrical circuit. These units are essential in understanding electrical systems but do not directly measure energy consumption like kilowatt-hours do. Therefore, using kWh allows for a straightforward assessment of energy usage over time, making it the appropriate choice for expressing electrical energy consumption.