Dan Gelbart's lecture: • 2021 Nov.25 - Dan Gelbart
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@kevinwhitehead60762 ай бұрын
I worked for a casting company using aluminum. Our cores for the castings were made of resin coated sand . After the casting had cooled the sand was removed and recycled. The sand and tiny bits of aluminum were ran across a belt with a powerful magnet as the end roller. The aluminum bits would actually leap off the belt over a divider and into a bin .
@nonyadamnbusiness98872 ай бұрын
*run
@luck4842 ай бұрын
@@nonyadamnbusiness9887 Sounds like an eddy current separator, a standard piece of industrial equipment.
@ScarboroughSt2 ай бұрын
Eddy currents would drag those types of metals off a conveyor feed.
@bpark100012 ай бұрын
Inside that end roller is another roller inside studded with strong magnets, whirling FAST in the same direction the outer belt-drive roller is turning. The aluminum is lifted & thrown forward, away from the end of the belt. The sand drops straight down. This is used in recycling centers to separate out aluminum from paper &glass. (Steel is separated out first by another overhead upside-down moving belt at right angles with strong stationary permanent magnets above.)
@hugueslecorre48932 ай бұрын
If only such a magnet can attract salt out of water, can always dream.
@qazmatron2 ай бұрын
You added a shorted turn to make an electromagnet into a ring-shaped "shaded pole". When energized with AC, It has a feeble attraction for copper and aluminum PLATES in CONTACT with it. (You could remove the copper ring, assemble two concentric coils, and drive them independently. That would use less power, and let you tune the frequency, phase difference, and waveform for maximum attraction.)
@superalpha2 ай бұрын
I remember eddy current "magnet" to pickup copper and aluminum in Popular Electronic magazine of the 1980s.
@jimsvideos72012 ай бұрын
Fun fact, you can replace the copper ring with a coil, scale it down to 3.5 mm or so and use it inspect nonferrous materials for cracks.
@emilyyyylime-2 ай бұрын
This sounds interesting but I have absolutely no idea what you're referring to. Mind elaborating?
@jimsvideos72012 ай бұрын
@@emilyyyylime- Eddy current nondestructive testing.
@Andy-df5fj2 ай бұрын
@@emilyyyylime- It's called magnetic particle inspection and is used for finding cracks or surface imperfections on ferromagnetic materials. Basically, the subject being insoected is magnetized then dusted with magnetic particles that tend to clump up at the surface areas around cracks or other disruptions on the surface.
@justus19952 ай бұрын
@@emilyyyylime- Eddy Current NDT. You have a small probe, like a tablet stylus, that has two separate D-shaped coils on the end. One these coils induces an electric field into the material that is tested and the other picks it up. The reading of the reading coil gets zeroed on a known-good piece of metal. When sweeping the probe across crack, the reading changes and signals the user with a spike on a display and a sound
@thequestion75502 ай бұрын
Fun fact, experiment is king?
@aeroearth2 ай бұрын
Used in AC solenoid valves and in AC relay designs and known as a "shading ring or coil" or "Frager spire or Frager coil" to reduce/eliminate frequency chatter. Cable driven speedometers and tachometers use a permanent magnet rotated by the cable to drive a copper or aluminium drag cup which carries a hairspring and the pointer at the shaft end sitting above a printed dial. Drag cup also has a small amount of nickel iron alloy fitted which shunts some of the magnet's flux but as the cup heats up with the induced current and its electrical resistivity rises, shunts less magnetism so compensating for temperature variations. Modern vehicle instruments use moving coil or moving iron meters.
@lowiq8882 ай бұрын
Yes but the device in question is not a magnet. The device is an autotransformer. Electromagnets use DC current.-
@EgonSorensen2 ай бұрын
Leonard R Crow - Attracting Copper, Aluminum & Other Non-Ferrous Metals - Extra - an excellently illustrated book well worth reading for its experiments and theory.
@esuelle2 ай бұрын
I second the recommendation, that book seems to offer a better (and simpler) explanation of the effect. I don't quite think the rotating field thing is the answer.
@glevideo2 ай бұрын
That opens up the thought of putting a second electromagnet inside the larger one (instead of the copper ring) and through the proper electronic circuit the phase and frequency feeding that coil could be variable. Adjusting from 90 to 180 degrees phase and from 30 to 120 hertz would make an interesting experiment.
@lowiq8882 ай бұрын
very interesting although the device is not a magnet. The device is an auto-transformer. Electromagnets use DC current.
@framusburns-hagstromiii8082 ай бұрын
Sheldon explains physics to Penny....or words to that effect
@heftyjo28932 ай бұрын
So, it's still a repulsive force. But because the magnet fields are being twisted around onto themselves, it's repulsing the aluminum into the magnet to give it the appearance of attraction.
@nomandoerr8742 ай бұрын
Well put.
@IndieGuvenc2 ай бұрын
there's nothing behind it how could it be repulsed?
@IndieGuvenc2 ай бұрын
I don't know either btw, jus saying this is weird
@IndieGuvenc2 ай бұрын
I always found magnetism mysterious, the fact that it acts like gravity but it made of electric
@nomandoerr8742 ай бұрын
@@IndieGuvenc The field itself has been warped so that it pushes from behind in a way...I think. Lol
@davidhofman43412 ай бұрын
Years ago I tool a tour of an incinerator. They made their money by collecting steel and other metals out of garbage. A magnet took out the steel and other magnetic material. They used a very strong different magnet for a flight diversion for the other metals. As a aircraft mechanic, I was baffled how a Canadian aircraft company could crimp an aluminum tube onto a steel plug with no mechanical contact. It pushed the tube into rings in the rod ends.
@markcollard93262 ай бұрын
Z-pinch?
@davekni26 күн бұрын
Only company I'm aware of who makes such tools is Maxwell Magneform. The crimping is done with magnetic repulsion due to eddy currents in aluminum.
@GeorgeGeorgalis2 ай бұрын
Cool, I knew about dropping a magnet through a copper tube, but never imagined the property could be used like that.
@Scrogan2 ай бұрын
When you said some might figure it out from the ring alone, it snapped for me. The copper ring adds a phase shift to the magnetic field, just like in a shaded pole motor. Very neat. Here I was thinking you’d need 3 concentric solenoids being driven 120 degrees out of phase to create an inwardly moving magnetic field.
@kevinavillain46162 ай бұрын
Try it with miu metal and you'll end up with a big surprise. You essentially have created a stationary rotor and is a simple way of explaining it. The current generated in the piece of metal held up against the oscillating magnet allows it to be held in place. Two things I'd like to try is super cool the metals held up against the magnet and change the frequency on the magnet input
@dumpsterdave37102 ай бұрын
OMG Thank you!!! I watched that lecture and it blew my mind (classic Gelbart) but also drove me crazy that he didn't discuss it further.
@michaelperrone38672 ай бұрын
Awesome! I want to try filtering out gold with this now
@SimEon-jt3sr2 ай бұрын
I'm sure no one thought of that before
@BETTERTOMARROW2 ай бұрын
Was thinking the same thing .
@siriusleto37582 ай бұрын
The idea is simple. Thinking, being competent and successful in implementing it is complex. Almost everyone thought of flying like birds, very few invented machines capable of flying.
@papafrank70942 ай бұрын
For fun, pull the gold to the sides of full Goldschlager booze. Talk about a cool bartender trick. Also this could be a "catch all" for my sluices. Pull the black sand out with one magnet, use another to raise the flour gold from the silt. Lose NONE of the super fine gold.
@vovochen2 ай бұрын
HOLY SHIT ! Youre able to seperate non-magnetic metals by size with this !!!!!!
@arthurmoore94882 ай бұрын
To be fair, we can already sort of do that using Lez's law. Another comment and reply talks about an eddy current separator that just separates out aluminum and other non-ferrous metals. However, there's nothing stopping a more precise version acting like air separators do.
@arthurmoore94882 ай бұрын
To be fair, we can already sort of do that using Lez's law. Another comment and reply talks about an eddy current separator that just separates out aluminum and other non-ferrous metals. However, there's nothing stopping a more precise version acting like air separators do.
@havocking92242 ай бұрын
please define "non-magnetic" metal
@readyeddie20652 ай бұрын
@@havocking9224he means not like the normally magnetic metals like iron or steel
@havocking92242 ай бұрын
@@readyeddie2065is good, he fixed his comments :D
@ChillCat6652 ай бұрын
You should veiw it through a ferroscope or put ferro fluid on it and see how it behaves
@Toca_waffle8432 ай бұрын
ferro fluid? - perhaps warm copper grease
@assassinlexx19932 ай бұрын
I was hoping he was going to show those magnetic lines interaction
@ddegn2 ай бұрын
I thought the size of the metal pieces would be important. I suspected the repulsion would be only at the edges of the cylinder but I'm still surprised it works. Thanks for making the contraption and explaining it. I found it very interesting.
@fxm57152 ай бұрын
Good explanation, Cylo. Thanks for sharing it.
@christophergiannetti48112 ай бұрын
It took me a minute after seeing the copper ring, then I realized you took Lenz law and hit it with that uno reverse card. You had your magnet push the aluminum toward you because it couldn't pull it.
@lowiq8882 ай бұрын
The device is not a magnet. the device is a transformer.
@thomassuit74502 ай бұрын
@lowiq888 Tell me, where are the output leads of the transformer? In electrical circuits, transformers via the ratio of turns in their primary (input) and secondary (output) coils either step voltage up, thus reducing current; step voltage down, increasing current; or they keep voltage the same, providing electrical isolation. Transformers do not convert electrical energy into mechanical energy; electromagnets, solenoids, and motors do that.
@christophergiannetti48112 ай бұрын
@lowiq888 I should have put magnet in quotes.
@lowiq8882 ай бұрын
It is not a magnet, and it pushed the aluminum because of mutual inductance. Are you illiterate like Elon Musk. He uses the word "compute" as a noun. Barack Obama thinks technology is an adjective. Magnets do not attract copper yet some transformers do.
@lowiq8882 ай бұрын
did you watch the video? Transformers don't really have output leads. You can turn a transformer around and use the output for an input and so they are called primaries and secondaries. Transformers do convert electrical energy into magnetic fields and back to electricity and can provide isolation. Some Auto-transformers do not provide isolation. The device is an autotransformer. (it has a single core.) Transformers are devices that use MUTUAL INDUCTANCE. That is what this device does. The copper ring is the secondary. I if I could examine the device and play with it, we can confirm or deny all that. Additionally, the paramagnetic material that is attracted by the device is probably charged due to mutual induction. That is why it sticks. All the evidence points toward the device being a transformer. You would have to contradict the dictionary and many other books to call it a magnet. Magnets simply do not attract AL and CU. I have also seen so called AC solenoids. These are considered to be solenoids, not magnets. The transformer is atypical, but that don't make it a magnet. DC motors often have magnets in them. Does that make a motor a magnet? No. Does that make a doorknob a magnet? The earth is a magnet. How can you deny that the copper ring is being charged by mutual induction? The copper ring is also similar to a device called a CURRENT TRANSFORMER. Lastly I would say that if you can turn it on, and make a spark with it, then it is a transformer. Magnets do not make sparks and arcs. You can probably connect the output leads to opposite sides of the copper ring, or from the core and the copper ring. Try to connect 2 wires, one from the attracted sheet of copper, and one to the core.
@RKroese2 ай бұрын
The magnetic field through the copper ring, produces a current and the steel "core" inside the ring produces another magnetic of the opposite pole. The same happens in the non ferrous metals. Although they are not magnetic, they DO produce a current when exposed to this magnetic turmoil and creates its own current AND magnetic field, and so they attract. So its not the copper or aluminium that is attracted, but the magnetic field of the metal that is attracted. I imagine that if you use the right size of copper ring and piece of non ferrpus metal, you could also repel.
@wiretamer57102 ай бұрын
The magnetic field is folding back into itself so it is still repelling the AL, but its repelling it TOWARD itself. The cool thing would be to embed a more powerful coil in the end of the steel core.
@LeandroAndrus-fn4pt2 ай бұрын
Smart professor. Using the Zeigarnik effect to make students go and learn more about the lecture and even duplicate the experiments.
@aeroearth2 ай бұрын
The most important lesson I learnt at school and college was to go find out for myself.
@MadHeadzOz2 ай бұрын
@@aeroearththat is for sure a lesson that can be learned from those institutions. My experience was that particular lesson was frowned upon and not intentionally taught.
@antonhelsgaun2 ай бұрын
@@MadHeadzOzby some lecturers yeah. It's indirectly saying that their teaching isn't good enough
@pmpwiz2 ай бұрын
I have no idea what you said but as soon as I saw the copper ring I knew exactly what was happening. Thanks for the video.
@thigtsquare9502 ай бұрын
Thanks for showing the magic trick. Indeed once you show the copper ring (an the previous mention of Lenz’s law) it all makes sense.
@thomassimonton850323 күн бұрын
Thank you for sharing this was very informative. You made it easy to follow you. Thanks again
@burningdust2 ай бұрын
Thanks for sharing this! Very cool.
@quoudten2 ай бұрын
07:05 *Subsolenoid*.. I love that😂
@yeroca2 ай бұрын
great job! I understood your explanation. Makes sense.
@SamMason02 ай бұрын
As another check on understanding, might be nice to build a different sized magnet and make sure the effect behaves consistently. I'm assuming it would, but be interesting to see how it scales. E.g. larger diameter and different lengths.
@JoinGamesLinks2 ай бұрын
Longer Cylinder in Center may Strengthen Inner Rotating Toroidal Field lines ?
@srtamplification2 ай бұрын
This principal has been used for over a century in many applications. This is how an induction disc relay operates. The disc itself is aluminum, but yet it rotates when current is applied to an induction coil with a shaded pole. This creates the torque necessary to rotate the disc. Also, the current is also passing through the disc itself, so the magnetic field created there interacts with a stationary permanent magnet that is used for dampening and speed of the disc.
@theothermikeg2 ай бұрын
I've always had the idea of making a brass magnet for use at the range, it goes something like a push reel mower but with magnets instead of blades and a catch bag.
@realcygnus2 ай бұрын
Nifty AF ! I was well aware that you could get skip/drag-like interaction via "physical" rotation but its more or less just akin to ordinary braking. I can't say I ever seen exactly this though. 👍
@PaulHirsh2 ай бұрын
Thank you.Very clear. Got me thinking about applications
@jayc24692 ай бұрын
If this is Your idea I would get it patented!! I had an eye injury in the 00's caused by recklessness with my Dremel, grinding the burrs off some Alum . I was asked the usual Eye Injury questions but because the fragment in my eye was Non Ferrous, they couldn't use the High Powered EM they had, for removing Ferrous objects from the eye(!) so they had to use the Scraping action of the blade of a scalpel to dislodge it!!
@carltauber29392 ай бұрын
You had me completely befuddled. That is slicker than snot!!
@SM1965Doc2 ай бұрын
Found very interesting, enjoyed the video.
@Electrotech19802 ай бұрын
Great job at explaining this.
@lowiq8882 ай бұрын
Great job except that it is not a magnet, it is a transformer, and 202 commentors seem to thing it is a magnet. Modern humans are clearly stupid, and it gets worse when they watch TV.
@vannoo672 ай бұрын
When you're defying the laws of physics, you've got to be sneaky.
@ChillCat6652 ай бұрын
Like a shaded electromagnet
@LibertyPPG-Ай бұрын
It's akin to dropping a magnet down a copper pipe! Eddy currents opposing the downward fall.
@DavidWoodrum2 ай бұрын
This same principle is used in old watt meters to create a torque on the disk
@thiggs3832 ай бұрын
It's all just magic! That was interesting. Thanks for sharing 😊
@avivzilbermintz22422 ай бұрын
It’s interesting you mentioned Dan Gelbart. With many of your videos, I tend to think that you must be his successor. 😊
@Thinks-First2 ай бұрын
Thanks. A brand new area of physics I'd never heard of.
@GordieGii2 ай бұрын
Another way of thinking about it is that right against the face of the bar is a more efficient place for the plate than out in the complicated field. i.e. Less heating. You might get some interesting insights by trying a ring or a star shape to control where (or how large) the eddy currents can be, and try thicker and thinner plates. An interesting phenomena which might be related, is that inductive proximity sensors (which are good at detecting ferrous targets) are only about 10% as sensitive (compared to iron) to aluminum targets, but 90% as sensitive to aluminum FOIL.
@MacGuffin1Ай бұрын
eddies to attract eddies
@peterbonucci96612 ай бұрын
Would it work for a copper sheet the same size as the aluminum? It seems like copper's higher conductivity would decrease the size of the magnetic field. It looks like it is a balance between the induced current and the size of the plate. Too small of an induced current and it doesn't interact with the source field. Too large of a current and the source field gets too small.
@POKEtheBearsaid2 ай бұрын
Can you use this effect for pulsing the field on and off that acts like a pezo electric crystal. Tesla mentioned using frequency in dealing with electrical currents
@bobod830_92 ай бұрын
Seems like the same principle as when you drop a large magnet onto a chunk of aluminum, itll slow itself. I think that also works if you pull it away quickly, so all you need is some kind of arrangement that has a moving magnetic field, and the part you wish to attract inside the part of the field moving in the correct direction.
@historyisfake91532 ай бұрын
This is amazing. Thank you xx
@Ryan_Tidwell2 ай бұрын
Well explained sir. I assumed the title was clickbait and this was a scam. I understood enough of the physics to believe it is not.
@peterfulk1742 ай бұрын
I made a large electromagnet years ago. I drilled a hole in the top of the steel core and put a dal rod in the hole and put an aluminum disk with a in the center on the dal rod. When I ran the electromagnet on AC the aluminum disk would lift in to the air vibrate and hum. After about a minute it would get very hot. When I tried it on DC the aluminum disk jumped straight up hit the ceiling and fell to the floor. I was told that aluminum repells 2% of the magnetic energy it receives and gold repells 1%.
@elvendragonhammer54332 ай бұрын
It's also worth taking eddy currents into effect, for instance how if you drop a strong magnet through an aluminium or copper pipe the eddy currents drastically slow down the magnet. Cool the magnet with liquid nitrogen & you get close to 3.5x stronger eddy current. Also, said currents always follow the right hand rule, so they introduce the current into the pipe horizontally, & usually a good centimeter or better in front of the actual magnet. The same thing happens in a car alternator because of the use of a "crab cage" rotor. Because it's "legs" are bent @ 90 degrees it redirects the magnetic field almost completely, via a 90 degree shift, even though the magnets themselves field lines are in the opposite orientation.
@TheTruthPlease1002 ай бұрын
So if you had more windings in the core would the magnetic pull be stronger? Or how about multiple rings seperated by steele? Is ther a way for high grade stainless to be attracted?
@guesswhoisme-bb6nc2 ай бұрын
great explanation. I totally understand the attraction of opposing fields of flux...
@connordavis50862 ай бұрын
Does the larger prices of metal not work because on the edges it starts to make a larger outward facing field? Also what would happen if you had the copper annular inserts in series? Or is it generally better to just have one main ring?
@daruscole15862 ай бұрын
Very interesting. Could this principle be used in further magnetic levitation research?
@brokens1097Ай бұрын
Interesting & absolutely clever. Inversely, wonder how that would effect power generated.
@garygranato91642 ай бұрын
you should get some of that plastic sheet stuff that allows you to see magnetic fields and hold it above your copper ring electro-magnet
@TheTruthPlease1002 ай бұрын
It's called magnetic film.
@zdenekbreza37702 ай бұрын
Do you know what would happen if the coil wasn't around the steel, but if it was an aircoil and would be inserted into a steel tube? Would such electromagnet attract diamagnetic materials as well?
@LordPenteАй бұрын
So the electron magnet has to be AC power source correct? I have a CNC Milling machine so I'm going to make one, but I didn't know if I needed to use AC or DC power. I assumed AC, but if it can be done with DC then I could make a more portable one.
@HCBurlingame2 ай бұрын
Have you played with different frequency's?
@sgwbcg2 ай бұрын
One interesting thing to evaluate is the current in the copper ring. I have feeling that the current must be surprisingly large because a single turn secondary is creating a strong enough field to sense repulsion. Odd having very large current in ultra low resistance short that doesn't generate much heat. Seems odd to me, anyway.
@BentRimProductions2 ай бұрын
the " Loop " simply pushes against the " material " in it's path , hence the reason the larger piece doesn't move toward the coil , it blocks the path .
@michaelgonzalez9058Ай бұрын
That is why elcectricity is thunder
@earthssecretenergy2371Ай бұрын
Thank you your video was interesting and good to have this knowledge..
@earthssecretenergy2371Ай бұрын
Thank you very much and your video is very interesting as well.We can expand on these subjects
@Maxim.Teleguz2 ай бұрын
Can this method then be used to improve EMI by forcing the electrons to move towards ground much faster?
@kostozeviar47552 ай бұрын
Great Work Thanks
@ryaneverett99012 ай бұрын
Are the effects the same if you put an aluminum ring in the other end of the steel rod?
@davidpacholok89352 ай бұрын
EXCELLENT SIR!
@glowiboi2 ай бұрын
Lovely explanation, I wonder how different ratios of area and volume of the Sub-Sokenoid yo the Electromagbet would change the effective size of copper we can attract.
@lowiq8882 ай бұрын
I don't know, but the device is not a magnet, or an electromagnet. The device is an autotransformer. Electromagnets use DC current, not AC. Almost 200 commenters got that wrong.
@MrPazzerz2 ай бұрын
What happens if you rectify the AC, or just cut off the negative part of the wave?
@punkinhaidmartin2 ай бұрын
There is some hysteresis in the paramagnetic material that causes a N pole to persist momentarily after the field reversal?
@Longbowgun2 ай бұрын
I think we can look at this another way as well: we're not attracting the nonferrous metals, we're trapping them by inducing current.
@SumNumber2 ай бұрын
Nice explanation . What else would be good to know is what exactly is reacting to the toroid field in the aluminum and copper . Both are known to be highly active in the presence of a magnetic field. Thanks for the share. :O
@baby-turtle2 ай бұрын
What does your magnet do when you put it on the copper ring end?
@terrylane14922 ай бұрын
I don't know but it seems like this could generate some weird Eddy currents around the copper embedded in the Ferris core and they would be the source of your toroidal field at the front. Do you think this could also be accomplished using a steel core then wrapped with wire then covered with another steel sheathing and then wrapped with another round of wire to generate the magnetic field from a power source? Would it be possible to increase the intensity of the toroidal field that way?
@wbeaty2 ай бұрын
Does it work better if you put saw-cuts across the iron parts of the face? The original 1950s project use wads of nails as laminations. Perhaps even an "X" cut in the steel core, would block eddy currents and improve things (a lot? or a little?)
@Theghostescapes2 ай бұрын
Eddie! Eddie!. No, I mean Eddy. Eddy currents
@johnnywelder2 ай бұрын
If you had a whole in the center of your metal shaft and copper ring, and you put it in the water, would that make a pump?
@ronstiles26812 ай бұрын
A very good explanation of magnetic properties, thanks sir, I have a question what would happen if you insulated the copper windings on that electro magnet with a copper and or aluminum ring how would that affect the reaction? Would it increase or decrease its magnetic state?
@gmeast2 ай бұрын
WOW! and the Al and Cu are still repelled by an alternating current, it's just that the "face" of the AC magnet is essentially "virtual" (for lack of a better word). I knew I had seen the math before, but only as it applied to negative effects in Switched Reluctance Motors. Depending on frequency and motor design, the ferromagnetic attraction between the Teeth on the Rotor and the Teeth on the Stater will be reduced thus lowering the Motor's efficiency.
@stonekutteralАй бұрын
can you use iron filings to show what is happening with the currents?
@smotpokera2 ай бұрын
Do you think this would work for metals such as gold or silver? Has anyone tried to use an electro magnet for such
@alexportiiii64142 ай бұрын
super cool, thanks!
@CheezeCurdler2 ай бұрын
Does the copper ring need to be isolated from the steel core? If it's not already, what would that do?
@danrbarlow2 ай бұрын
Copper's so significantly more conductive than steel that this demonstration works. If he cut the steel cylinder halfway through from end to end before pressing the copper ring in, it would give a stronger effect. Then insulating the ring would make it stronger still.
@ChillCat6652 ай бұрын
Dave Lambright has videos where he has made aluminum magnetic and other crazy stuff
@magnuswootton61812 ай бұрын
thanks! so does it work with carbon as well?
@your_utube2 ай бұрын
A ferrite core would be iron dust mixed in a ceramic can also work, but what if you now suspend copper or aluminium filings instead of iron and see if that does not work better?
@jahulibowlin10522 ай бұрын
That has got to be the most well explained video. The question I'm asking myself is would that happen because negatively charged ion are interacting with positive ions to create the field also?
@rjv23952 ай бұрын
does this work for all non ferrous metals, gold, silver filings?
@abB-vm7cu2 ай бұрын
i remember looking up how recyclers sort metals from ferrous...i found out they have a second coil/field...when the aluminum/copper are in the field they can be moved by the electromagnet. but mainly they use a winnowing proess whereby air pressure is used to blow off light things like aluminum cans are blown off and heavy things continue on down.
@UnionYes10212 ай бұрын
Wow! Thank you.
@MF175mp2 ай бұрын
"Apprentice, go get the aluminum magnet"... Sure, there it is
@noneedtoknow53152 ай бұрын
Thank you!
@sto27792 ай бұрын
Interesting. Thanks.
@Andrew-su8xg2 ай бұрын
Thank you.
@energymarketchile2 ай бұрын
I wonder if making a core with two concentric copper rings would increase or decrease the attraction force...
@ryaneverett99012 ай бұрын
The field is enveloping the aluminum and copper field?
@petevenuti73552 ай бұрын
I know you can make a magnetic field that can go a further distance from the magnet by bringing it close to an opposing field (same polarity) I wonder if that's possible to do with this and how far you could push the effect? I wonder how far you can push the effect with just a permanent magnet for that matter?