World’s Simplest Electric Train

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The trick in the video is that the magnets are made of a conducting material and they connect the battery terminals to the copper wire, so the battery, magnets and copper wire make a circuit that generates a magnet field just in the vicinity of the battery.

Original link: http://www.youtube.com/watch?v=aTnK1gl_yag

VIAHome Science
SOURCEYouTube
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