Electrical energy consumption is measured in which units?

Electrical energy consumption is measured in kilowatt-hours (kWh) because this unit represents the amount of energy used when a device consumes one kilowatt of power over the period of one hour. This measurement is essential for understanding how much electricity is consumed over time, which directly relates to billing for electrical services.

Kilowatt-hours take into account both the power (in kilowatts) and the duration of usage (in hours), making it a comprehensive unit for evaluating energy consumption. In practical terms, a standard power meter measures the energy used in kilowatt-hours, reflecting the total energy consumption that is billed to customers.

Other units mentioned serve different purposes; watts measure instantaneous power without regard to time, voltage refers to the electric potential difference, and amperes relate to the flow of electrical current. These units do not fully capture the concept of energy consumption over time like kilowatt-hours do, which is why kilowatt-hours is the correct choice for measuring energy usage.