kilovatttunni

Kilowatt-tunni, often abbreviated as kWh, is a unit of energy commonly used to measure electrical energy consumption. It represents the amount of energy used by a device consuming one kilowatt of power for one hour. A kilowatt is equal to 1,000 watts, which is a unit of power. Therefore, a kilowatt-hour signifies the expenditure of 1,000 joules of energy every second for the duration of an hour. This unit is primarily employed by electricity providers to bill consumers for the electricity they use. For instance, if a 100-watt light bulb is left on for 10 hours, it would consume 1 kilowatt-hour of energy (100 watts * 10 hours = 1000 watt-hours = 1 kWh). Understanding kilowatt-hours is helpful for managing household energy usage and identifying which appliances are the biggest consumers of electricity. It allows for a standardized way to compare the energy efficiency of different devices and to estimate the cost of operating them. The kilowatt-hour is a derivative of the SI unit of energy, the joule, with one kilowatt-hour being equivalent to 3.6 megajoules.