No reliable estimates are available for the total amount, but it is substantial in the US and around the world.
It should be noted that electrical generation is inherently "wasteful," because maintaining voltage across an entire electrical grid creates waste heat in the circuits and Transformers. However, reducing unnecessary electrical consumption benefits consumers by lowering their bills, and also forestalls the need for additional capacity to be constructed to meet peak needs.
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Electricity can easily be wasted. Let's say you have all the lights on inside your house and your not using them, that's an example of wasting electricity.
Electricity can be wasted in non-renewable resources as well. This is because once you use fossil fuels, they can not be replaced.
Cost per unit of electricity depends the type of generation used. ie:- thermal hydel, nuclear etc. hydel electricity is cheaper and now a days it cost less than Rs.10 per unit in India. whereas thermal electricity cost less than Rs. 20 per unit
Residential Electric RateCost per Kilowatt Hour (Cents) as of 9/1/11 Single Family Dwelling8.850Basic Service$10.00
13,600 miles per second :-) True dat
http://www.booneelectric.coop/coop/tips2.htm According to this webpage the average garage door opener is 800 watts and uses 6¢/hr worth of electricity (based on a 8 cents per kilowatt hour electric rate).
It depends on the system and the operating speed of course but as anexample of a typical monorail used for public transportation the Wuppertaler Schwebebahn uses 2.98kWh/km or 1.85kWh per train mile.This translates to approx. 2.25kWh per passenger km (1.4kWh/passenger mile)