What is Power consumption?
[[File:Power consumption graph.PNG|thumb|Power consumption from different mobile devices]] In [[electrical engineering]], '''power consumption''' refers to the [[electrical energy]] per unit [[time]],<ref>{{Cite web|url=http://lafenergy.org/essays/energy.php|title=Power and Energy|website=lafenergy.org|language=en-US|accessdate=2017-11-06}}</ref> supplied to operate something, such as a [[home appliance]]. Power consumption is usually measured in units of watts (W) or kilowatts (kW).<ref>{{Cite web|url=https://www.eia.gov/energyexplained/index.cfm?page=electricity_measuring|title=Measuring Electricity - Energy Explained, Your Guide To Understanding Energy - Energy Information Administration|website=www.eia.gov|accessdate=2017-11-06}}</ref> The energy used by equipment is always more than the energy really needed. This is because no equipment is 100% [[Energy efficiency|efficient]]. Power is wasted as [[heat]], [[vibration]]s and/or [[electromagnetic radiation]]. For example, a [[light bulb]] does not only convert electric power into light; it also makes some heat. ==References== {{reflist}} [[Category:Electrical engineering]]