Magnetic attraction to aluminium, brass, lead and copper. 

Hi there, as soon as I felt the reaction of the magnet on the copper I wanted to share that bit of fun. Kind Regards ... Andy.

Thank you very much for explaining this phenomenon, which has been puzzling me for quite a while! Very informative video, I really enjoyed it. Thanks!

That's a nice little demonstration. I like the different metals lined up to see the difference. This is known as Lorentz Force and I believe it's also where copper bracelets and such derives their therapeutic nature from. Also, you shouldn't let neos slam together like that as they can splinter sending high speed slivers in your face.

I think there is some mu-metal in a hard drive too, to keep the magnetic field away from the platters. Might be kind of useful for some projects.

This is a very good demo.

yep, its not attraction or repulsion really but an opposite and equal reaction to the induced field. and also this principle is used widely in the industry, like train brakes

Nice experiment, but misleading title. This is not magnetic attraction. There are magnetic forces due to the induced currents (Eddy currents) as correctly stated, but if the magnet isn't moving there is no interraction (noticeable at least - paramagnetism)

Nice video Andy, thanks for the demonstration! Beautiful view you have, which region is that?

Hi, I’m glad you’re having fun with the magnet, sounds very powerfull, watch your fingers as it only be a matter of time until it bites you. Remember, the magnet isn’t attracted to the metal it’s attracted to the electric field that is generated in the metal when you move one relative to the other. Thanks for the feedback. Kind Regards ... Andy

You have a fabulous channel! Especially love your experiments, and your videos on electronics and radio. I know making these videos is not easy. I have been restoring radios and TV's for years, have been experimenting since I was a child. I am an engineer myself, and I find you to be a natural teacher, very gifted at that. Your metaphor using light to explain "Q" was brilliant, never seen that before! Looking forward to more vid's on the Jason sweep generator and your S680X, they are inspiring.

Interesting tests ....thank you.

I really enjoyed this and the way you explained it was clear and beneficial. you did a great job! Thank you so much Andy!

Amazing- very clever!

Thank you Kind Regards ... Andy

Great video demo.

Nice display.This will help me when I run into some parts of Galena that are small spots on ore rocks.To help define that if its magnetite or galena to some extent.Thanks.

Hi Rick, if you get the opportunity to try it out I think you’ll have a bit of fun simply because is contrary to what you normally expect. Although I didn’t show it on the video I also dropped the magnet down the inside of a copper tube and it takes ages to fall through. I think I might buy some more regular shaped neodymium magnets to play with. Kind Regards ... Andy.

Thank you Andy, that is a great demonstartion.

Hi there, when I see and feel something like this I can understand how folk get drawn into thinking perpetual motion is possible, if only we could get the effect to work for us in some positive way to drive itself. I don’t think I’ll spend too much time on that idea, thanks for watching. Kind Regards ... Andy.

Thank you sir. Very nice demonstration 👍🙂

Andy, I wonder if the engineers of modern earphones, earbuds, cellphones, etc., had the neodymium magnet's relationship with the copper wiring in mind during their design phase? The use of magnets in my iPhone and iPod have incredible audio quality considering the tiny size of the speakers. It is amazing how some things we thought we knew as young men learning electronics have been turned on it's head. Wonder what the next 60 years will do to today's logic and reasoning?

Hi Mick, I hope you’re thinking up interesting experiments for you to have a go at and not trying to draw me in. I need to invent the time machine so I can catch up with some of the chores I should be getting on with. All the best ... Andy

Nice demo! I also like your explanation of the induced magnetic field that is opposite the neodymmagnet, therefore they attract, and this slows the magnet down. /TH

Hi there, the other place you can see this of course is in our cars. For those who haven’t see it, when we had mechanical speedometers the pointer of the speedometer was connected to an aluminium disc and a rotating magnet was positioned close to the disc, the magnet was connected to the cars gearbox via a flexible drive cable. A light spring provided a bit of resistance and returned the pointer to zero when the car stopped. Kind Regards ... Andy.

I’m sure there’s plenty of opportunity to find out more about the unusual properties of these high power magnets but really do watch your fingers! All the best ... Andy

Good morning from Tennessee, Andy. The experiment with a neodymium magnet and copper wire wrapped on a piece of plexie will make a fine winter project for me along with the square copper tube, too. I don't have a square tube of copper, but I do have a roll of copper roof flashing which I can form into a square. One never gets too old to have his imagination stirred! Many thanks! 73, de Mick - WB4LSS

Hi Mick, try dropping a neodymium magnet down the inside of a copper tube, the feel/timing it will be totally alien to you. Even thought you have seen the videos and you’re anticipating something different it’s only when you try it for yourself that you realise it’s unbelievably different to what you know (or think you know) of the physical world. The better the fit (but touching) the better the effect, try it and let me know if I’m right. Kind Regards ... Andy

Loved concept.😊

Induced current, velocity slowdown is used to sort non-ferrous metals. Heck, Andy probably invented the sorting technology.

Maybe a control to compare the speed of the same magnet on 45 degrees would have helped for us to see a comparison. Great video! Very helpful.

Hi Jason, if only that was true I’d be out there with a coil made of ‘gold’ and doing a bit of prospecting, hi, hi. But just for clarity it’s the magnetic fields produced in the associated metals that are ‘attractive’ and not the metal itself. Thanks for watching. Kind Regards ... Andy

Hi Mick, I think the changes in technology are fascinating, think of photography going from wet film processing to electronics and calculators going from big cogs and springs to IC’s, TV going from CRT to LED. In my industry, induction heating, a 20KW Radio frequency generator went from a huge machine you could stand up in to a machine small enough for a man to carry. In another 60 years the changes will be phenomenal, someone might might design a computer that’s fit for purpose. Regards ..Andy

Hi Andy. I've been out of pocket for a few months and haven't had much time for "RU-viding". It looks like I have a lot of catching up to do on your channel! I have always been fascinated with magnetism and look forward to trying your experiment for myself. Those hard drive magnets are definitely to be taken seriously. I was at a local Hamfest a few years ago and came across a vendor selling them. There were a couple of fellows looking over the vendor's stock and one of the men thought i

good information in knowing potential flaws in magnet testing metals and alloys of fake silver and gold

I have a rare earth magnet from an old blockbuster dvd security release system. It is probley 5 times stronger than one found in a hard drive and smaller. I have 4 inch copper plate and I nearly have to tip it completely sideways for it to move... Im going have more fun with this and see what else I can do with it... Supposedly you can buy them at uour local hardware store. I didnt know these were metals could be attracted... Great video!! Thanks!

Hi Andy, haven't seen this since my college days. I remember the setup where the lecturer had a horseshoe magnet mounted so it was free to run on its horizontal axis and close to it was a copper disk also free to rotate. When the magnet was rotated it caused the copper disk to rotate. It had us all stumped until he explained it! However, I'm still searching for an explanation of lines of force that explains how magnetism actually works!

Hi Mick, when I get too old to play they can nail the lid down. By the way the copper tube doesn’t have to be square, you can try any shape of magnet down any tube profile, the ‘Anti Gravity’ effect will be more pronounced the closer the coupling between the magnet and the tube. Kind Regards ... Andy gw0jxm

An interesting experiment would be to wind enameled wire on to a piece of flat plexie and observe the effects of the magnet sliding down the copper coil with various AC-DC voltages applied.

Thank you that was interesting.

Thanks for sharing. If using a magnetic core produces more current,why don't people use them in their wind/water turbine coil windings? Is it because it's simply easier not having to make the cores,or is there a real reason behind it? I ask because I'll soon be building a generator and making my own stator,but if it's because it's simply easier I'd prefer to make magnetic cores for my windings.

Nice video!

so between aluminium and copper, wich material gave the strongest magnetic field / went slowest? equally???

Hey that’s a blooming good point! Credit cards are a bit vulnerable also. I urge anyone that wants to play with these magnets to look at the safety videos on YT as it really brings the point home. I’ve got a big magnet off an industrial ‘Magnetically Beamed Triode’ valve and that’s bitten me a couple of times but these neodymium jobbies are in a class of their own for snappiness. Kind regards and thanks for the reminder, I guess even quarts watches with hands could be susceptible. Andy

Hi there, well thank you for the complements, not sure I quite deserve such a glowing response but thank you anyway. I’m desperate to get back on to the Wobbulator just to be able to clear it from my mental list of things to do but I have a lot of ‘proper’ jobs to do before I can spread out all the kit needed in my now ‘tidied up’ workshop. OK on ‘Q’, I hope I give reasonable explanations and I figure most folk can relate to light. Thanks again. Kind Regards ... Andy gw0jxm

When I took my brass swarf to the scrappie, he pulled a magnet on a chain across it and when he examined it (magnet) he declared it "irony" as it was sticking to the magnet. The result being the payout was reduced. I subsequently tried this with certified brass, and kept the swarf absolutely uncontaminated and sure enough it stuck to the magnet. In the past I have had aluminium totally rejected. Is it a con trick?

OK think on this... What do you think would happen if you take the magnet in the video and place it on a nonmagnetic surface and you then hold a thick sheet of cooper above the magnet and then rapidly draw the copper sheet up and away from the magnet? Do you think the magnet will lift and try to follow the copper or do you think the magnet will not move? By the way if you get the answer wrong I'll make a video and show you what actually happens. Thanks for your interest in the video Kind Regards

I think the magnet will try at least to lift up yes, as long as there is a changing field that is of course. but this is not an ordinary attraction per se.. this is simply an observation of how they try to oppose any induced magnetic field, so if you move the magnet some way along any copper surface in any configuration, the magnet will try to stop this new "motion" by opposing it and in this case it will try to stop the copper plate from going up. thx

Thx u help me out for my homework!

Aluminium has possibly lower resistivity than copper. It is a very good electrical conductor and hence used on power distribution lines. Whilst we normally think of aluminium as a metal it is in fact a metalloid, a semi-metal, and has rather different properties to true metals. It is for example paramagnetic, repelled by magnetic fields.

If bullets were solid aluminum maybe magnets would be able to stop them? Does the lead slow the magnet at all? Would have been good to have a control on that board. I can maybe do it myself soon. One more metal id have liked to see is silver. Ive been doing a lot of comparisons between silver and copper and silver seems to beat copper in alot of applications.

what kind of current is there when magnet is sliding on the copper?

Yep. What happens as the copper sheet is rapidly lifted the magnet lifts and tries to follow the copper, you could argue that it’s an attempt to maintain equilibrium and that’s fair enough, but no matter how you look at it, is not repulsion. Anyway I think that it’s an action that probably still has many uses that we haven’t stumbled on yet. I'll probably make the video of the magnet lifting in the hope that someone may think of a useful application for it. Kind Regards ... Andy

That was awesome

I just wanted to share what he demonstrated is also known as diamagnetism and paramagnetism. When he states that the materials are not magnetic, he is indicating that they are not ferromagnetic. The drag from the magnet on the materials is either in the direction of the magnetic field, or in the opposing direction of the magnetic field. Diamagnetism is a property of all materials and opposes applied magnetic fields, but is very weak. Paramagnetism, when present, is stronger than diamagnetism and produces magnetization in the direction of the applied field, and proportional to the applied field. There are other factors in place as well such as the way the material is fabricated, the thickness, the "grain" of the metal. These factors change the behavior of the paramagnetic and diamagnetic materials. The only paramagnetic material he is using is the aluminum. The Brass, Copper, and Lead are all diamagnetic materials. You should turn your water on and stick one of those magnets next to the water falling and you will see the water being repelled. Also, if you attach the magnets to a wheel and spin it with a drill you will see the transfer of the motion to the material and it will start to move as well.

Do you think it's possible to collect nonmagnetic metallic particles from air?

A maxtor or rather maxflaw hard drive; what a surprise

Hi there, I looked at the video, I don’t think there’s any connection myself. I’ve moved huge machines on my own using levers and blocks, it just takes time. One of our engineers was sent to China, he saw workers move a massive press (Like a drop hammer) he said the foreman blow a whistle and men came from everywhere, surrounded the machine then more men came with large bamboo canes and poked them in every available hole and lifted the machine, should have been imposable but they did it.

With 2 (or even 3) extremely powerful permanent magnets with a lead sheet as an alternating shielding that can easily slide fully between and fully out of the way by a tiny fraction of electric power that the pull and fall away of those 2 magnets can keep cycling for many thousands of year as non-friction. The reason what this will not break the laws of physics is because it can take very little power to slide the lead sheet to detract those extremely powerful magnets. This does not have to be gravitational device if placed in a torus loop in which the magnets alternate corresponding with the lead sheets. The major downside would be the back and forth vibration and maybe too noisey.

Hi I have a question are you still available?

To Float them in the air or make a voltage you need a metal Brush!

so cool!

Thanks

Hi there, I didn’t show it in the video but I did drop the magnet through a length of 15mm copper tube and it took ages to fall through but while I was thinking how to video the inside of the tube I come up with the idea of the copper plate and that made me think about other electrically conducting nonmagnetic materials that I had to hand. Thanks for the feedback. Kind Regards ... Andy

Also can you please help me as I am trying to figure out if the metallic line in the center of the bottom of a solid copper used tea kettle I want to buy in a consignment shop has lead in it or not.. it is at a very cheap price and I can tell it a solid copper because I used to have one that was solid copper inside and out.. the problem is when I looked in this and saw the ridge I could tell it had been soldered which was a disappointment to me and it is not the same color as the copper so I need to know if it's some kind of material that could be harmful and I need to be discreet when I go to test it in the store.. would you have any suggestions ?... I doubt that once I buy it he'll let me return it if I am able to test it at home and find it on satisfactory.. therefore I would need to test it in the shop

I wish i had a teacher like this in school.

good to know for storing guitar pickups in close proximity to each other a lead or brass shield wood be good

What about silver and what about gold ..have you ever tried those ?

thanks, now I know the meganitic properties of these 4 metals

I'm actually surprised that aluminum is almost as good as copper for the effect. I thought aluminum would be significantly weaker. I'm planing to design a magnetic coupling, probably I can use aluminum instead of copper to reduce price.

hmm actually this is a demonstration of repulsion between aluminum and magnet, due to a varying field, ie..the induced eddy currents that oppose the magnetic field. With this principle you can that's why hover a n AC coil above a copper sheet. thx

Watch out for your watch!

a copper or aluminum core coil should attract nonferrous metals :)

thats fine and usubility for the gold nugged search system .

I'd be interested to see this effect over a gold plate!

Decay Metals are making me wondering, how coin money do not decay for years? Even gold change colour in time by become darken to black.

That's interesting sci. Never herd of it but there's the proof

I'm sure Andy knows, no such thing as perpetual motion exists. Unless one can express perpetual zero resistance upon a loaded experiment.

Thank you, I don’t think I did a particularly good job of describing the ‘Feel’ of the magnet sliding over the copper, but if feels instinctively wrong, a bit like how I’d expect mercury to feel if it was swilling around in the bottom of a dish custard. Thanks for the feedback. Kind regards ... Andy.

is this lenz's law???

Acctully true

Now you need gold plate :-)

I got the same magnet!

Not a very good demo due to the unequal size and thicknesses of the materials... I have done the same experiment and brass actually induces much more eddy currents than aluminum and copper... I used 2cm thick blocks of each material... and brass created so much eddy current reactions that it stuck to it as if magnetic traveling extremely slow down the block of brass... speed of a snail just for reference as opposed to the other metal that traveled at the speed of an ant.

i want u to know that what this guy is saying in lamans terms is that it isnt atracted to the metalic object its its acctualy resitance from the load that u have created in the curcut u have now created so its more of a electronic resitance as oposed to a magnetic resitance b\c we all know if u pass a magnet past a metal obj. it will create cureent its this current thats creating the load= resitance weird but simple =3-

It could be true because I made a coil that attracted an aluminum screw.

You should use non shiny brass instead. Maybe the magnet will slow down more.

Grade School Tricks with magnets, im sorry this is beyond old news, in grade school they used a clear tube with a magnet being dropped simultaneously down the clear vinyl tubing & a copper pipe the pipe magnet fell 10 seconds after the other it is simply the magnet interacting with the electrons in the copper nothing more

you know i think i need a hard drive or 2

I know I should be learning but I couldn't help noticing the wooden man seemingly holding the books up with his dong

👍

Lenz's law

I think if you drop a piece of aluminum through a copper tube slows the aluminum down quite a bit

Hi Nick, on the contrary, I think that there is reasonable evidence to suggest that the earth has been perpetually spinning around the sun for quite a while now and I’m banking on it carrying on for at least a fortnight but if you know something different let me know and I won’t fill in my tax return. Hi hi. All the best ... Andy

cannot hear you"

Hmm

This is very interesting. I just watched another video with a similar experiment. The other video ties the phenomena into how the ancient civilizations moved the megalithic rocks to make Stonehenge, The Pyramids, Coral Castle and others. Check it out. Ancient Knowledge Pt.5 - Teaser / Coral Castle, Magnetic Forces, Sacred Sciences, Anti-Gravity

N.

We all know that passing a magnet thru a copper wire that is coated will produce a current. Well then passing a magnet thru an iron wire that is coated will produce a current also , but does the copper wire produce more electricity ?

Sir i want a magnet for the coppar catch

Hey Andy, What an interesting experiment, that is super. Never seen that setup, but it is really effective showing back EMF-magnetic fields. Nothing like a great visual for learning. Regards Rick