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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).
a fridge, freezer and an electric can opener
electric current (alternating)
An electric can opener is a household appliance which uses electricity. It is powered by a motor which includes a permanent magnet so it can spin the same way consistently. It's blades spin so slice tin or can, open. It is usually found as well as used in the kitchen...
kinnetic
The same as a manual can opener: opening the lid on a can.
Electricity has been found to be the best thing to use for an electric current.
You use electricity every time you use a light-bulb, a computer, an electric stove, a refrigerator, etc. You use magnetism (as well as electricity) every time you use an electric motor, or a loudspeaker. For example, the motor in electric toys, in a refrigerator, or in a hair drier.
They use electricity.
The first electric garage door opener was invented by C.G. Johnson in the year 1926 in India, Hartford City. Before that the electric garage door opener wasn't very popular.
== == how do you use a can opener
Electrocuting and killing the fish that they eat.