5 hours later... Ok, that's good, but I think we can do better. So, I've hooked it up directly to a nuclear reactor.

"It repels it the other way" Attraction: Am I a joke to you

Every scientist ever: "Let's see what happens!" *Adds liquid nitrogen* "Let's try it again!"

People seem to think that using a permanent magnet as the core of an electromagnet will give a stronger electromagnet than using an un-magnetized core. Permanent magnets have a large static field but very little "amplification" of the field from an electromagnet. Their permeability is close to that of air because they are fully saturated by their own magnetization. So, the field you get is pretty much just the sum of that from the permanent magnet and that from the air-core coil. Materials like un-magnetized iron, on the other hand, have a huge permeability, often hundreds or even thousands of times that of air/free space, so they multiply the field generated by the coil by that factor. This only works up to the point where they saturate, though. So, in the end, using a PM as a core just gives you about the same total field as you could get by using an un-magnetized high permeability material for the core, as is normally done in electromagnets.

Cody did a good job of making that really powerful magnet look as unimpressive as possible

It's possible you might have gotten more magnetic field with a simple iron core. Iron saturates at abojut 1.6 tesla, whereas the nedinium magnet's flux density is less than that. Getting really high flux densities beyond the magnet material's saturation point is difficult, so best to start with something that has a nigh saturation point (iron)

Cody, why doesn't your magnetic finger implant tear through your skin and stick to the super magnet?

Codys new door bell!

2:10 I yelled 'NOPE' predicting what was about to happen. Was not disappointed :)

2:10 The force is strong with this one.

Cody, I swear you're my spirit animal. Keep being awesome.

This was really interesting Cody! I love your experimentation and just learning new things with us. Thanks for putting this up :)

Where is your mercury blood test?

I want a tiny magnet in each fingertip. You could feel the magnetic field in much better resolution that way I'd bet.

New meaning to silver bells now... thanks Cody!

This helped me understand so much about electric motors and generators

Cody, I'm pretty certain the first way you applied current to the coil had the field created going in the same direction as the permanent magnet. When you switched the direction of current, such that the coil tried to center concentricly on the magnet, the effect was making the return flux path turn much tighter and stay between the coil and the magnet. Consider when you initially applied current to the coil in the original polarity and the coil moved up until it's bottom opening was at the top surface of the magnet; if the fields had been in opposition, that should be the most difficult position to obtain, not the position it comes to rest. The motion indicates the fields were of the same direction. You will have to secure the wire well if you wish the fields to be additive.

4:23 "So I've now roughly doubled the voltage" Seriously Cody... Where do you get all these batteries hahaha

Good on you Cody. You put a lot of work into your videos and it shows.

I like when you say something and I get it. I feel so excited to understand things.

here, hold on, let me grab a huge bucket of ln2 i just have laying around...

+Cody'sLab Cool project. Definitely a thought provoking experiment when trying to visualize physics. Actually the reason that the spark jumps repeatedly to make the "bell" @ 9:00 is because of the capacitor you added. Basically, the capacitor is being charged by the battery, and when you short it, all of the current goes through the inductor (coil) and the capacitor is emptied. Next when the magnetic field collapses, it sends the 90 degree phase shift of the capacitor charge back through the system, so double whatever voltage you have the batteries wired for at least was what you were seeing as the brilliant spark. You could achieve this affect with the wire always connected if you had a correctly matched inductor and capacitor. In this case, it looks like the batteries provided so much current that they saturated the circuit and did now allow resonance to occur when the wire was securely attached. Looks to me as if the wire is being pulled towards the terminal by the higher voltage spiked caused by resonance. Then the end of the wire was melted greatly increasing the resistance for the time of the arc. This dampening affect could limit the current into the circuit and allow resonance. Source: my degree

Awesome!

Wow my physics course about electromagnetism just started. What a timing, thx for the video!

I have a magnet in my finger too and I would be scared as hell to even go near a magnet that big let alone hold it in the same hand as my magnet implant.

Cody, to avoid getting iron crap all over your magnet, just wrap it nicely in plastic. i do that for alot of smaller magnets :)

I'm so early! I just wanted to let you know Cody that watching your videos has helped me IMMENSELY in my college chemistry classes (OChem, Gen chem 1/2, etc.). Every time I am learning a new concept, I think about the videos that you have made about them, which helps me to visualize the process. Just...Thank you for doing this. I and hopefully many others appreciate it. -Alex

I've gotta say, Cody you are one lucky guy. You've got this huge, beautiful property to play around on and explore, access to tons of fun equipment and chemicals, a beautiful gf, a great family. You seem like you've got things figured out in life, and that's something I really like about you. Anyways, I love these videos and I've found they've been getting better and better lately. So whatever you're doing, keep it up! Cuz you're doing something right.

Cody you should make a battery backup system with all those batteries. I've just finished mine.

Yikes man, sometimes you scare me. A few times around 9:30-ish you came very close to having a 100V 600A arc flash in your face, while swinging the ends of those battery cables around near each other. Also, those gloves were probably sufficient for the voltage levels you had on the batteries, but the inductive kickback from that coil was probably a couple kV, making it 'uncomfortable'.

Thank you for your work and lessons.

Glad to see your channel is taking off! I came in around 100k subs, and that seems like just a few months ago, now your quickly getting close to 1 million. Keep it up cody!

I too have 12 lead-acid batteries laying around :)

Cody, you should try using a really and an oscillator to test if a high frequency of on and off will levitate it

Cant believe I haven't subscribed after so many years of watching. So glad mercury vid went viral, keep up the good work.

A huge like for Cody's Lab and The Action Lab

I think I just saw you at Cal Ranch when you were checking out, but I was too nervous to say hi. I just wanted to say I enjoy your videos, and your channel is one of my top 10 favorites on KZfaq.

Nididinium? It's Neodymium! Love your channel, anyways!

you never fail to make me enjoy what i see

You've actually demonstrated a VERY useful feature that few people have recognised in the realm of electromagnetic force application ... Bi directional solenoids! In a normal solenoid when the steel core is outside of the coil, irrespective of the current direction, the core is always attracted inside the coil. Using multiple small neodymium magnets makes it very easy to produce a push/pull solenoid WITHOUT using springs. By utilising a non ferromagnetic core (e.g. nylon rod) attached to the end of a stack of neodymium mini magnets then supportive current flow will pull the core into the coil and vice versa it is pushed out. Either end of the core can be used to pull or push clearly. BIG advantage of this becomes obvious when considering mechanical locking and interlocking mechanisms as ONLY a pulse of current, not continuous current is required to maintain a stable position (only when the core is horizontal, otherwise gravity puts a natural bias into the system). Who'd have thought ... A bistable solenoid that maintains its position WITHOUT power. Useful in power outage situations potentially!

2:12 I wasn't paying attention and this scared the shot out of me

Was that piece of rusty metal at the bottom reducing the magnetic flux that flowed through the coils?

You momentarily had the largest home made solenoid I have ever seen. Sweet video.

I got the shivers when you reminded me of the magnet implant...

why do you have so many batteries sitting around lol

Does the insulation on the wire and the plastic central part of the coil have any effect on the current that is applied to the magnet?

I appreciate what you're doing Cody I enjoy your channel keep up the great work! 👍🏻

Magnets are so cool! I am fascinated with the potential of futute technology. The possibilities are incredible!

2:12 haha looks so funny, like magic :)

Cody, how do you go through airport metal detectors with the magnet fragments in your finger? (assuming you fly)

Cody you would make an awesome teacher!

Great videos from a new age mad scientist!

How in the world would you ship that super magnet without it attaching to the truck

WE NEED MORE POWER

Good video Cody, this was cool to watch!

Cody. I just want to say I really enjoy the vids. I have actually learned a lot from u keep up the great work

Could you make a magnetic jackhammer that acts like the silver jumping up and down on the magnet

The way you are holding the terminals of a 120V, ~1000A current potential battery bank almost in your bare hands SO gives me the heebie jeebies ... Specially bringing the contacts so close to each other and with super cool liquids around that make plastic brittle. Your hands were just isolatated from the voltage by thin rubber gloves? IF you SHORTED those terminals, part of the metal contacts would have just evaporated/exploded, potentially damaging the gloves and in a blink and you would have been hanging on to the terminals and couldn't let go cause its DC, thereby slowing burning to death. In the worst scenario. Maybe your body resistance have been high enough for you to just jump away from it but gosh, what a gamble. Cody, please short a fully charged battery bank like that out a few times in a controlled way for "educational prorposes" :) I think you don't have enough respect for the amount of power potential you are playing with here. 120Vx1000A = 120.000 Watt (at least for a fraction of a second until the conductors heat up).

Love your video's cody! Can't stop watching anything you do. Always learning from your video's and you make them very understandable. I don't study anything in science, rather economics however this got me a bit wondering of what I might want to do. Please continue making your video's!

Thank you Cody for the video I always enjoy them. this was cool, keep up the good work.

Couldn't you make an automatic coil gun with the wire bouncing back and forth with that, plus some sort of rapid clip to load the metal you are shooting?

Cobalt, Dysprosium, Sulfur, Lanthanum, Boron.

cool demo, nice side effect plasma with the 'bell'.

cool experiment for building speakers. cheers!

if you still had a whole magnet in your finger, would it be a bad idea to be around a big magnet like that.

Put the silver coin in a tall thin glass. The coin will levitate.

We need more geniuses like you in our world

Cody. Thanks mate. Keep it up

Interesting. Could you try to measure the coil resistance when warm and cold? see how close it gets to zero. Also, are you familiar with podkletnov's claims? spinning super conductor disc with a hole in the middle, agitated by high voltage shock supposedly creates a gravitational disturbance pulse column perpendicular to the spinning disc with significant range.

I though your finger rejected the magnet and you had to remove it

"because I have a magnet in my hand..." That's just beautiful

Give this man a television show!

Was the silver acting like the copper wire creating its own field and jumping whilst making electricity?

I thought you removed the minute piece of magnet from your finger?

Dude im so fascinated by your knowledge, It motivates me to learn as much as I can. Im on the path to becoming an electrical engineer :)

Per the usual video... just a joy to watch and learn some more science :D thanks for that and keep up the great work!

Why do you have pieces of magnet in your hand?

You can build a warp drive with that contraption, all you need is superconducting wire and a vaccum to prevent the liquid nitrogen from vaporizing.

It's really cool how you feel the magnetic field with the magnet in your hand, it's like another sense, like a cyborg or something (or bird with the compass in their head) It's just ingenious!

I forgot the reason I found your channel was the magnetic implant episode, and I've been subscribed ever since

Cody there is an experiment talked about by the ex head of lockheed skunk works where you tape two strong neodymium magnets together so they are repelling each other then drop them from a high place and they take far longer to fall than an equivalent weight of iron - repelling magnets clamped together fall slow.... how about doing that one?

i heard that Cody most of the time reply's to comments

You do what I wish I had done.keep up the good work so I can live vicariously thru you LOL

Don’t stop making vids ur inspirational thks

how to get electrocuted 101

he says "neodinium" differently every time

Thanks for your experiment. Just don't break any fingers with those strong magnets. Take care Cody

A Great video, Thanks for sharing.

first, eat my dust suckers

Cody will not reply to this comment.

I wasn't surprised at all when wind messed up Cody's delicate magnetic experiment and he fixed it with a piece of broken glass.

That 5 ounce silver round is really cool. I want one like that.

Sparks flying, wires melting; Cody: "I've made a bell."

Great video

Cool magnet.

You should team up with Matthias! Your great knowledge in chemics and physics and Matthias´s huge engeneering talent would make an awesome combo! I´d love to watch the projekts developing during this collaboration!

I always felt so stupid for not understanding how physical force can be converted to electrical energy and vice versa, but you made it all so simple. It seems the lightbulb you lit up by sliding the copper past the magnet was actually in our heads.

Cody, nice video! I appreciate your thoroughness. Would have been interesting to see how the number of turns of wire or possibly how the types of wire impact the magnetic fields. Thanks again buddy!

I can't wait for the coilgun video!

2:27 oh shit i forgot about that. That's so cool cody u got a sense that normal people don't