Linear_induction_flashlight.jpg
![File:Linear induction flashlight.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/8/87/Linear_induction_flashlight.jpg/800px-Linear_induction_flashlight.jpg)
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Summary
Description Linear induction flashlight.jpg |
English:
A linear induction or
"shaking" flashlight
, powered by muscle power so it doesn't require batteries. It contains a linear electric generator which generates electric current when the flashlight is shaken lengthwise. The current charges a batterylike "
ultracapacitor
", which provides energy to power the LED lamp bulb. The linear generator consists of a coil of wire
(visible in center of tube)
and a cylindrical neodymium magnet
(to right of coil)
which slides in a tube through the center of the coil when the flashlight is shaken. Its magnetic field induces current in the coil by electromagnetic induction when it slides through. 10 seconds of shaking provides about 2 to 3 minutes of light.
|
Date | |
Source | Own work |
Author | Chetvorno |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication . |
The person who associated a work with this deed has dedicated the work to the
public domain
by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.en CC0 Creative Commons Zero, Public Domain Dedication false false |
Annotations
InfoField
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This image is annotated: View the annotations at Commons |
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English:
Coil of wire generates current when magnet slides through it
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English:
Neodymium magnet in plastic tube slides back and forth through coil when flashlight is shaken
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English:
Switch and ultracapacitor which stores current from coil are in this section
Captions
A "Faraday flashlight" powered by a magnet which slides back and forth inside the flashlight when it is shaken