Saturday, 17 September 2016

electromagnetism - Can magnets rotate infinitely?


There are many videos on youtube in which people arranged magnets in circle and rotated one placing in middle of that circle on a shaft, and the magnet (magnet motor) starts madly and continues its movement.
Do they really rotate infinitely?
If so, do they from where they get that extra energy to move so fast and infinitely?


EDIT: This question is about real world scenario


UPDATE: I am unable to find that particular video about which i talked about -- I added them to my favourites, but they are all now deleted :( -- there are hundreds of that that kind of videos. Some example videos links
http://www.youtube.com/watch?v=dT9s33X9D4I
http://www.youtube.com/watch?v=yei0NMqUaZ8

http://www.youtube.com/watch?v=5DvPLFX5gwA
http://www.youtube.com/watch?v=i0oUaPZ_wF8
http://peswiki.com/index.php/OS:Screw-Magnet_Motor
http://www.youtube.com/watch?v=aHVBu77jz4w




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