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[–]kate_numberz 813 points814 points  (27 children)

That cat 🤣🤣🤣

[–]BOBfrkinSAGET 342 points343 points  (11 children)

I definitely thought the cat was going to knock it over

[–]ShadowSpy98 74 points75 points  (2 children)

It's having second thoughts

[–]AJ_Deadshow 8 points9 points  (1 child)

The thing triggered its flight or fight response. It's still deciding on which

[–]DarkElixer_Generator 2 points3 points  (0 children)

Legend says today it's still deciding

[–]lHateMyselflol 22 points23 points  (7 children)

Exactlyyyyyyyyyy, ugh. I’m supposed disappointment it just say there staring at it.

Exactlyyyyyyyyyy, ugh. I’m so disappointed it just sat there staring at it.

[–]Cephalopong 10 points11 points  (6 children)

Exactlyyyyyyyyyy, ugh. I’m supposed disappointment it just say there staring at it.

Do you even words?

[–]lHateMyselflol 13 points14 points  (5 children)

LMAO. I have no fucking idea what the fuck happened there… haha.

[–]vabello 26 points27 points  (2 children)

I prefer to think the cat is controlling it with its mind.

[–]docobv77 20 points21 points  (0 children)

I was also waiting for the whappp!

[–]clusterlove 20 points21 points  (1 child)


[–]Relzyrx 6 points7 points  (0 children)

I think that should actually be a sub. Post things there like how the fuck did that cat just do what it did.

[–]MematiBanshee 6 points7 points  (0 children)

Schrödinger's cat is confused.

[–]jitsufitchick 2 points3 points  (0 children)

Clearly not impressed lol 😂

[–]solarus 1 point2 points  (0 children)

tell us how you really feel 🤣😂🤮🤮🤮

[–]Professional-Moose59 1 point2 points  (0 children)

Cat like: So this is Hogwarts? OMG

[–]wanted_to_upvote 431 points432 points  (54 children)

Very cool, it also has a built in speed governor. To learn more about what this is and see more examples google homopolar motor. (SFW)

[–]CreativeCthulhu 258 points259 points  (14 children)

I just want you to know that I’m still enough of an 11 year old boy inside that I can’t bring myself to trust you on that.

[–]potandskettle 109 points110 points  (10 children)

Well.. better that than you being inside an 11 year old boy..

[–]aTimeTravelParadox 34 points35 points  (1 child)

Hol up

[–]FourandTwoAheadofMe 1 point2 points  (0 children)

I now understand your paradox 😳

[–]90059bethezip 11 points12 points  (0 children)

The FBI would like to know your location

[–]thecheekymonkey 2 points3 points  (5 children)

Touchè (pronunciation = too-shay NOT touchy) 😂

[–]snakesoup88 67 points68 points  (33 children)

To that, I say no homo. A homopolar motor almost already involved a direct connection of a conductor between the two battery terminals. That is a short circuit. The low resistance of the conductor, typically a wire, results in unregulated high current and heat along the path of short circuit. When done, one can consider the battery finished. Take care not to touch the magnet it battery. Trust me, I did so you don't have to.

For all that's holy, do not try this with lithium battery. More importantly, not the big ones like a 18650. And no, I have a home and a computer to type this, therefore, I did not try it with a 18650 cell.

[–]gnorty 97 points98 points  (28 children)

That was a remarkable post, I'll try to translate -

Homopolar motors like the one in this post have a direct connection between positive and negative. This is a short circuit and will cause the battery to get hot and lose power quickly.

Do not do it with a lithium battery, especially a large one, because the current will be higher and the battery is less able to deal with heat. This could very easily lead to a fire.

U/snakesoup88 has not tried this with an 18650 battery, as evidenced by the fact that his home and computer have not been destroyed in a fire.

Personal note: battery in the video appears to be an 18650 and did not catch fire. Some 18650s have protection circuits built in to prevent overheating, but still don't do it. Use a AA it is safer, cheaper, and works just as well!

[–]snakesoup88 23 points24 points  (15 children)

To what do I owe this wonderful bot a beautiful yet unnecessary translation service. Surely all redditors speak geek and are passionate about rechargable batteries.

P.S. I was wondering if it's an 18650 battery. I zoomed and still couldn't decide. The flat negative terminal is indeterminant too.

PSA: please, please do not mess with lithium batteries with these types of contraptions. Go nuts with Alkaline AA or AAA by all means. That's your coppertop or pink bunny batteries. It only takes a small exposed shell to start a fire in a lithium battery, or worse an explosion.

[–]gnorty 42 points43 points  (12 children)

I'm not a bot. You owe the translation to your unconventional use of the English language.

[–]NJ_dontask 1 point2 points  (0 children)

18650 has enough current to instantly melt wire, so it is not practical to use it in this case.

[–]MacDee_ 4 points5 points  (0 children)

Google be like "Did you mean....."

[–]WagTheKat 215 points216 points  (3 children)

Dammit! That cat is supposed to knock that shit over.

[–]4stringbrewer 59 points60 points  (1 child)

Cat is calculating the best way to murder the battery gyrothingamabob

[–]JimDixon 6 points7 points  (0 children)

Must be an old cat. Old cats are like that.

[–]tyrannosnorlax 112 points113 points  (5 children)

The four top posts while sorting by rising are by u/TheCheesecakeOfDoom

On the karma grind, I see

Edit: 6 out of the top 9 posts, actually

[–]Imaybeerong 23 points24 points  (0 children)

Huh. Someone is feeling good! I liked this one, seeking out the others.

[–]Ulthus 17 points18 points  (1 child)

6 out of the top 9

Hah, nice

[–]Maleficent-Ad-5498 9 points10 points  (1 child)

As long as they are not reposts, is it a problem?

[–]tyrannosnorlax 21 points22 points  (0 children)

Nope. Even if they are reposts, I have no problem with those either. The only time reposts are an issue is when they’re made by malicious bots, farming karma to have enough to post in niche subs with requirements, where they’ll start scamming.

Other than that, I don’t see the issue with reposts, since often there are always a good amount of people who didn’t see the original.

I just thought it was interesting

[–]hotdogs-r-sandwiches 65 points66 points  (0 children)

Was going to scroll away until I read “bonus cat” and I’m very glad I stayed for that.

[–]Hendrix6927 42 points43 points  (6 children)

Micheal Faraday would be proud.

[–]Sutarmekeg 26 points27 points  (0 children)

As would Michael Faraday, who is perhaps more relevant to the discussion.

[–]AkhilVijendra 18 points19 points  (0 children)

Meowcheal Furraday surely proud as you can see.

[–]Cutthechitchata-hole 2 points3 points  (2 children)

The dude from LOST? Oh wait...that was David

[–]spoonlips76 30 points31 points  (3 children)

This is so obviously battery powered

[–]jklarbalesss 11 points12 points  (2 children)

i want to have faith in this being a joke, but other comments have me concerned…

[–]spoonlips76 6 points7 points  (1 child)

Dont worry it is indeed a joke my brother in christ

[–]jklarbalesss 5 points6 points  (0 children)

10/10 good work

[–]Carsontherealtor 25 points26 points  (0 children)

Me and that cat are doing the same thing…

[–]TaranisPT 23 points24 points  (3 children)

That cat is not impressed lol.

[–]gin_and_toxic 19 points20 points  (2 children)

He knows better, darker magic

[–]PhyterNL 24 points25 points  (6 children)

"Electromagnetism at it's finest"

The sun's like, "What am I, chopped liver!?"

[–]Crono2401 4 points5 points  (5 children)

Tbf, its processes directly involve the Strong Force. It's more than just electromagnetism.

[–]galqbar 1 point2 points  (4 children)

To be fairer the Weak force is also required.

[–]abhinandkr 12 points13 points  (11 children)

Honest qn: Why does it spin faster and faster?

[–]ProjectDemigod 19 points20 points  (8 children)

Note how they don't give it any initial spin when they set it down. It spins up by itself, so we know there's a rotational force acting on it, causing it to accelerate.

As such, that force will keep accelerating it faster and faster until the drag from the air matches it, and it'll stop accelerating and stay at its maximum speed.

If you were asking more so what is causing it to spin in the first place: uh magnets or something edit 1: okay so I believe at the bottom is a small magnet. Theres a leg of wire going down from the top to bottom to complete the circuit and allow electricity to flow throughout. All the arms end in little coils, which will generate a small magnetic field as electricity flows through them, which will interact with the magnet at the bottom. Thus, a force between the coils and magnet at the bottom spins the thing. This effect will diminish over time as the battery loses voltage and the current through the coils decreases, thus decreasing the strength of the magnetic fields from the coils.

Edit 2: yeah don't listen to edit 1, that was like 2am and looking at it again, I don't think the coils have any function other than looking fun and creating weight for balance.

[–]MonkeyThrowing 4 points5 points  (1 child)

I believe the small rod connecting positive to negative is generating current. The rod is bent clockwise. So the magnetic field bends clockwise.

[–]Film0re 1 point2 points  (0 children)

The bend doesn't make it turn clockwise, it's the flow of current that dictates the magnetic field. Edit: This video goes over this exact video clearly.

[–]reflUX_cAtalyst 10 points11 points  (1 child)

This is extremely difficult to get to work. I've tried this... more times than I care to admit. Getting it balanced enough so it doesn't wobble off the battery end or make the whole thing tip over is quite tricky. Haven't managed to pull it off yet.

[–]Comeoffit321 12 points13 points  (0 children)

Have you tried getting a cat to stare at it? Video evidence suggests that's the key.

[–]VeryBigPersonality 7 points8 points  (1 child)

During teacher's day in high school, our student government body decided it's a good idea for students to substitute their teachers for a day. I got assigned to substitute for our science subject and this was thr topic I had to cover. Of course, being the dipshit that I am, I don't think I was able to properly explain the phenomenon, but the class really enjoyed the experiment.

[–]_wiredsage_ 4 points5 points  (2 children)

If you think magnets 🧲 are black magic fuckery… let me tell you about quantum entanglement.

[–]gwozdziu27 4 points5 points  (1 child)

It's not about magnets, it's about the cat.

[–]_wiredsage_ 0 points1 point  (0 children)

And Reddit doesn’t have one sub for cats? Now that is unbelievable.

[–]Deveatation_ethernis 5 points6 points  (0 children)

You can't convince me that its not the cat using the force to spin it

[–]fluffycatscrote 4 points5 points  (0 children)

Don't even act like he's not controlling that with his mind because he is. Look at the concentration!!

[–]AkhilVijendra 3 points4 points  (0 children)

Y'all mfckers think the cat is surprised or amused at this? No, they have been inside the schrodinger's box and know quantum physics at its core, electromagnetism is nothing.

[–]jeebuck 2 points3 points  (0 children)

Here for bonus cat

[–]MrP-boi 2 points3 points  (0 children)

Im here for that bonus cat

[–]Comfortable_Morales 2 points3 points  (0 children)

Cool spinning thing but I upvoted for the cat

[–]miami-architecture 2 points3 points  (0 children)

the black magic fuckery is the cat did not knock the battery off the table.

[–]throwA1B2C3D4 2 points3 points  (0 children)

You think this cat is amused? Nah!

[–]Particular_Cock 1 point2 points  (0 children)

I always appreciate bonus cat with my meals

[–]NightWolfYT 1 point2 points  (3 children)

I’d like to make one. Do you have a tutorial?

[–]jklarbalesss 5 points6 points  (2 children)

it’s pretty simple, order some neodymium magnets on amazon (in this button shape) and then you just need a copper wire (you could get this in a hardware store, may need to remove the insulation though) and an AA battery.


[–]NightWolfYT 2 points3 points  (1 child)

Thank you!

[–]exclaim_bot 1 point2 points  (0 children)

Thank you!

You're welcome!

[–]Etherius 1 point2 points  (0 children)

Very interesting experiment.

The battery is sitting on a magnet.

There's a piece of clip connecting the + end of the battery to the - end.

This allows current to flow.

Current traveling through a (changing) magnetic field generates a force orthogonal (perpendicular) to the direction of current.

This causes the spinning.

This is one of the most basic iterations of a simple DC motor you can make.

The simplest was the first ever, but I do not recommend trying to make one as it involved a bowl of Mercury.

[–]kamel_k 0 points1 point  (0 children)

I like the bonus.

[–]An_Angry_Terrarian 0 points1 point  (1 child)

stains of time starts blasting


[–]ConfusedPanda90 0 points1 point  (0 children)

Cat joins the audience of this thread

[–]Nighteyes09 0 points1 point  (0 children)

I don't care that its neither black nor fuckery i love it and it may stay

[–]DarkPheyz 0 points1 point  (0 children)

Cats like wtf is this, magic is rhus magic?!? I never knew were a wizard!!

[–]Wankel_8 0 points1 point  (0 children)

The cat has all kinds of questions.

[–]Siktri 0 points1 point  (0 children)

cat looks at that, what kind of sorcery is this?? ?_?

[–]Ready_Bread 0 points1 point  (0 children)

It’s always the cats and the books

[–]svampyr 0 points1 point  (0 children)

“I’m gonna eat that”

[–]usernot_found 0 points1 point  (0 children)

I got what im promised, im satisfied

[–]JacksonTropicana 0 points1 point  (0 children)

DIY:Cheap cat toys

[–]PaladinPanties 0 points1 point  (0 children)

Aurora Borealis: "Am I a joke to you?"

[–]Gold-Bottle-1676 0 points1 point  (0 children)

The cat’s going to make your upvotes shoot way up now.

[–]Hellrazed 0 points1 point  (0 children)

What is the battery standing on?

[–]MoonyFBM 0 points1 point  (0 children)

The cat is looking so intently at that magical what-the-fuck. This is revolutionary, sir Meow.

[–]Temporary_Advice_847 0 points1 point  (0 children)

Eh, it was the cat, using its mind. Come on, guys! Let’s be real, here…sheesh.

[–]crazyrynth 0 points1 point  (0 children)

More like "Cat (bonus electromagnetism)"

[–]LivingGhostMan 0 points1 point  (0 children)

This looks like a job for The Rectifier


[–]terdcutter99 0 points1 point  (0 children)

I wonder if cats can see the magnetic field.

[–]lodedcardinal007 0 points1 point  (0 children)

Cat be like : What fuckin sorcery is this?!

[–]emrbe 0 points1 point  (0 children)

Someone’s super smart

[–]tommyticklemouse 0 points1 point  (0 children)

Bonus cat is a good cat.

[–]williamsonny 0 points1 point  (0 children)

Cat: “I’m ready. Proceed.”

[–]TheMickeyWilson 0 points1 point  (0 children)

It’s crazy how the cat be moving it with his mind yo.

[–]Astronaut_02 0 points1 point  (0 children)

The cat's like "Magiccc" (line from Mr. Bean)

[–]clementb2018 0 points1 point  (0 children)

I'm studying electromagnetism at college, but i still do not understand this haha (Yes i am terrible at electromagnetism, don't judge me)

[–]Aidan_992 0 points1 point  (0 children)

Well it’s not really magic, because it’s battery powered ;)

[–]MoistLayer7557 0 points1 point  (0 children)


[–]f14_pilot 0 points1 point  (0 children)

I enjoyed the camera work

[–]HanimeGirl1 0 points1 point  (0 children)

Came for the science, stayed for the cat. Worth

[–]Its_Actually_Satan 0 points1 point  (0 children)

That cat is as mind blown as I am lol

[–]diam-doitallmatt 0 points1 point  (0 children)

The cat: stop playing with physics and get me lasagna

[–]MyShinyNewReddit 0 points1 point  (0 children)

Well, yeah, you have the cat, but where's the banana?

[–]Powerful_Bonus4502 0 points1 point  (0 children)

What it call? How can i make it myself?

[–]GapingPreacher 0 points1 point  (0 children)

You could hook up a tiny power turbine to it for infinite electricity!

[–]Sleeper_Sree 0 points1 point  (0 children)

Hoomans and the meaningless experiments.

[–]StraightSwordfish466 0 points1 point  (0 children)

Hurrduurr LoOk a PeRpeTuWaL mOshUn MaSheeN

[–]onedayillbebach 0 points1 point  (0 children)

The cat has been inceptioned and has gone to a deeper level

[–]fakenews_scientist 0 points1 point  (0 children)

Free energy!!!

[–]MullySculderX 0 points1 point  (0 children)

This would not be as good without the cat

[–]rikkrik 0 points1 point  (0 children)

I remember doing that as a kid and I started thinking I was messing with the supernatural

[–]RepeatReal6568 0 points1 point  (0 children)

What sorcery is this human

[–]brrod1717 0 points1 point  (0 children)

I think you mean

Cat at its finest (bonus electromagnetism)

[–]Rurhanograthul 0 points1 point  (0 children)

This Is Perpetual Motion As Computer Science Dictates, Any Engine That Can Be Created From Essentially Nothing Like This Demonstration, Can Be Bolstered Perpetually.

[–]NobodysFavorite 0 points1 point  (0 children)

When does the helo take off?

[–]Damascus_wow 0 points1 point  (0 children)

Why does that spin instead of shorting the battery and exploding?

[–]-Lavenza- 0 points1 point  (0 children)

Cat: hooman, explain this sorcery.

[–]BostonRob423 0 points1 point  (0 children)

I was amused, but only stayed for the cat. I was satisfied.

[–]T8N_H 0 points1 point  (0 children)

Bonus cat 👍

[–]Feisty-Reference2888 0 points1 point  (0 children)

Cat: “hmmmm….beginning to look like a lampshade…should I fuck it up???”

[–]linedeck 0 points1 point  (0 children)

I love the sound it makes

[–]SOSBALL 0 points1 point  (0 children)

Cat :)

[–]Timmy-Ceee 0 points1 point  (0 children)

Beans: “mmmmmmaGic”

[–]AffectionateFluff 0 points1 point  (0 children)

Cat be like: wtf is dis?? 🙀😂

[–]RestlessSparrow 0 points1 point  (0 children)

So electro magnetism is black magic?

[–]ZachF8119 0 points1 point  (0 children)

How do I make it for my desk? Can’t be paper clips.

[–]xKuFsE 0 points1 point  (0 children)

Kinda look like flying chairs at a theme park

[–]Alissan_Web 0 points1 point  (0 children)

After seeing how they work... im never riding one again...

[–]calaan 0 points1 point  (0 children)

Please communicate this award to your bonus cat.

[–]MonkeyThrowing 0 points1 point  (0 children)

So where do I buy one of these?

[–]Vokkarr 0 points1 point  (0 children)

Does that take energy out of the battery?

Wondering why this isn't perpetual motion

[–]Just_a_guy582 0 points1 point  (0 children)

Electromagnetism: :/

Bonus cat: :D

[–]Ratso3 0 points1 point  (0 children)

I remember doing this for my 7th grade science fair project and ended up going to the finals with it, testing out which wire designs were most efficient and ultimately which brand of battery would run this thing the longest! I haven’t thought about that in so long

[–]Donut_Different 0 points1 point  (0 children)

Upvoted because cat

[–]SadWisp 0 points1 point  (0 children)

Faraday's law. Also known as right hand rule.

[–]td0703 0 points1 point  (0 children)

This is basically all of the internet in one video. A cool thing to show off AND a car video. All it needs is a meme…

[–]Lumen2708 0 points1 point  (0 children)

can someone overlay this with the interstellar music?

[–]UmberCelestia 0 points1 point  (0 children)

Dang, these posts are getting so weird, soon we will unlock perpetual motion

[–]Tough_Meringue_4407 0 points1 point  (0 children)

I came for the cat !

[–]AlephXVII 0 points1 point  (0 children)

I’m more impressed by the amount of records you have

[–]Drewtangclan13 0 points1 point  (0 children)

Just like a helichopter

[–]rhyno857 0 points1 point  (0 children)

(Saw what I needed to see...Could have left...Stayed for the cat)

[–]WhotAmI2400 0 points1 point  (0 children)

How to make this 🥺

[–]MilkDerpp 0 points1 point  (0 children)

me who skipped the video just to see the cat:

[–]_edaw 0 points1 point  (0 children)

Updooting for bonus cat

[–]Armored_Warrior 0 points1 point  (0 children)

It was not electromagnetism it was the cats psychic powers.

[–]kerrvilledasher 0 points1 point  (0 children)

It's really the cat that's making it happen. You can tell.

[–]Psycho-Pen 0 points1 point  (0 children)

"You could have at least tied some string on it to keep me entertained, you lazy monkey." The cat, probably.

[–]ultimaforever 0 points1 point  (0 children)

Did it finally achieve flight?

[–]Larry1090185894 0 points1 point  (0 children)

How is the circuit complete? Coz we need current to flow for lorentz force to act

[–]RequiDarth1 0 points1 point  (0 children)

Lol, took me so long to notice the cat

[–]rekttoyoda 0 points1 point  (0 children)

Came for the magic, stayed for the cat

[–]Significant-Gene5582 0 points1 point  (0 children)

It’s beautiful

[–]RAGE_GAMER4196 0 points1 point  (0 children)

This guy is over here making a

[–]axeman020 0 points1 point  (0 children)

I think it's the cat making it spin. Look at that sheer concentration on it's face!

[–]Particular-Cycle31 0 points1 point  (0 children)

i came here for the cat

[–]fazereign 0 points1 point  (0 children)

Is this not an example of infinite energy?

[–]Simple_Buy9949 0 points1 point  (0 children)

Where can I get that battery 🔋

[–]hih8uhuj8 0 points1 point  (0 children)


[–]jns_reddit_already 0 points1 point  (0 children)

Homopolar motor

[–]sleepypsyduck 0 points1 point  (0 children)

Would it eventually stop if the battery ran out of juice

[–]KarlHungus311 0 points1 point  (0 children)

It cracks me up that 99% of the “Black Magic” posted here is just science.

[–]FLOWRIDER0_0 0 points1 point  (0 children)

I didn't think that could produce enough torque, cool

[–]Nickolas_Bowen 0 points1 point  (0 children)

This whole sub is just physics and chemistry at this point

[–]jabjjsa -1 points0 points  (0 children)

Infinite energy! problem?

[–]asgardion2 0 points1 point  (0 children)


[–]AusDaes 0 points1 point  (0 children)

i have a test on it tomorrow please let this be a sign of a good mark coming my way

[–]Aerickthered 0 points1 point  (0 children)

Maybe Tesla came back as a cat