| The Breakroom > The Water Cooler |
| Is Copper Magnetic? |
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| 75Plus:
Before you answer check out this video! http://www.chonday.com/Videos/magnetcopper1 Joe |
| Lew_Merrick_PE:
Joe -- No, copper is not magnetic! However, a magnet falling down a copper pipe generates a current within the copper that will oppose the field of the magnet providing the force opposing the drop. You can do the same thing (though with less force involved) with aluminum. I have used these principles to segregate materials from waste-stream processing for recovery. Somewhere I have a WWI era book describing how to make this work with fairly high volumes of materials... |
| BronxFigs:
Please tell me what kind of magnet was used. Is this magnet one of those high-strength, super expensive Neo-whatever magnets that cost a fortune? Fascinating video. Frank |
| NeoTech:
Its a neodymium magnet yes, and they arent that expensive, checkout supermagnete.de |
| JohnC:
That is incredible! So much so that I had to rush out to the shed to try it. I used a piece of thick-walled copper tube about 20mm internal dia, and a 9mm dia neo magnet. As I dropped the magnet down the tube, it slowed up as if falling through oil. Fascinating! :D The magnet was one I got from ebay at not much cost, but is very powerful. |
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