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-   -   Aluminium is not magnetic (http://www.diyaudio.com/forums/everything-else/232166-aluminium-not-magnetic.html)

M Gregg 16th March 2013 04:11 PM

Aluminium is not magnetic
 
Just for fun eddy currents..

Magnet dropping through aluminum cylinder - YouTube

Lenz's Law Demonstration in 1.5 Tesla MRI.mp4 - YouTube


Regards
M. Gregg

DUG 16th March 2013 06:25 PM

Magnet dropping through aluminum cylinder - YouTube

Copper pipe as well.

ArtG 16th March 2013 07:15 PM

A reasonable explanation is presented in another YouTube video:
Magnetic attraction to aluminium, brass, lead and copper. - YouTube

benb 16th March 2013 09:09 PM

Quote:

Originally Posted by DUG (Post 3413853)

As demonstrated here:
https://www.youtube.com/watch?v=hA8ImP_3XGw

M Gregg 16th March 2013 10:09 PM

More just for fun,

Eddy Currents and Magnetic Braking of a Pendulum - YouTube


Regards
M. Gregg

JMFahey 16th March 2013 10:14 PM

Well, if I drop an aluminum former voice coil inside one of my speaker magnets, if still unmagnetized it falls like a rock and hits the bottom plate with noise; but if magnetized it falls slowly.
Now a Kapton former VC drops like a rock always.

jcx 16th March 2013 10:53 PM

frog is not magnetic?
 
YouTube - levitating frog

M Gregg 16th March 2013 11:07 PM

This guy takes the biscuit..

Lenz Law "Eddy Current" Experiments 1 of 3 - Magnets falling through copper, PVC and PVC with copper - YouTube

:D..would a 12 bore move it..LOL

Yes it is asked in the questions under the video..what happens when you connect the copper wire ends togeather..:D

Regards
M. Gregg

JonSnell Electronic 16th March 2013 11:14 PM

I have an acquaintance. He runs a scrap yard. I was there one day when a person entered with some scrap metal.
My acquaintance asked the guy, "Is it metal, or is it aluminum?". ... Made me laugh!
Yes, on a more serious note, think about the speedometer in most older vehicles. They spin aluminum to induce eddy currents and move the meter needle and think linear motor technology.
Wonderful stuff, science!

M Gregg 16th March 2013 11:18 PM

Quote:

Originally Posted by Harleyjon (Post 3414209)
Yes, on a more serious note, think about the speedometer in most older vehicles. They spin aluminum to induce eddy currents and move the meter needle and think linear motor technology.
Wonderful stuff, science!

Drag-cup generator..

Regards
M. Gregg


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