No, an electric can opener does not use electricity when it is not in use, provided it is unplugged from the power outlet. If it remains plugged in but is not turned on, it typically does not consume significant energy, as most modern appliances have low standby power consumption. However, to ensure no energy usage at all, it is best to unplug the device when not in use.
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
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.
An electric can opener typically ranges from 40 to 100 watts, depending on the model and brand.
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.
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
They use electricity.
I am assuming you mean an electric can opener. Remove the cutter assembly and wash it in warm, soapy water. Rinse thoroughly with hot water, dry and replace. It is a good idea to clean an electric can opener frequently, otherwise the area around the cutter becomes a hotbed for bacteria.
Electrocuting and killing the fish that they eat.