Monday, 2 December 2013

Lenz’s law & why do magnets fall more slowly through a copper tube?


Lenz’s law & why do magnets fall more slowly through a copper tube?
When you move a magnet past a metal plate or through a copper tube you generate a current.
The current it’s self generates magnetic fields which oppose the magnetic field generated by the magnet impeding it’s movement
The key is in explaining that the law runs both ways; current generates magnetic fields, and magnetic fields generate current.

Read more:
http://regentsprep.org/Regents/physics/phys08/clenslaw/

#lenzlaw   #physics   #experiments
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4 comments:

  1. Marc McNaughton2 December 2013 at 22:18

    Fascinating stuff. Another good demonstration of the effect: Magnet Brakes its own fall

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  2. Corina Marinescu2 December 2013 at 22:22

    That was great, thanks Marc McNaughton !

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  3. Josiah Allen3 December 2013 at 20:41

    pretty cool stuff!! i could see myself doing that for hours just to watch the magnet fall slowly

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  4. Jacek Szram20 December 2013 at 13:48

    I think,  It is amazing effect when you try do it faster, with bigger velocity. For example - pull it down (jerk it or drop a higher initial velocity etc.) or try quickly remove alumnium plate which is situated between magnetic poles.
    Greetings :-))

    ReplyDelete