How does an Electromagnet Work?

[@joelee_opium]

Got a whole science project due in two days that I haven’t started. This vid came in clutch

[@phillpauley6672]

What have you been doing? Loser! Nerds are better off later in life than slackers. DO BETTER!

[@abby-qg8ry]

Studying for huge science test tomorrow! This video really helps me understand more how electromagnetics work!

[@phillpauley6672]

It's sad that it's easier to learn from KZbin than school.

[@greens_for_the_money-r2o]

how'd y'all do on the test?

[@JF-361]

Studying for a fundamentals of electricity test and this helped a lot!!

[@blackopal3138]

You can change the direction of the field, but can you manipulate precisely where the field is in space? So, if you lined up paper clips in a circle with the magnet in the middle, could we choose which clip to attract when it turns on?

[@Science.Buddies]

Hi - you can do this with multiple electromagnets, but not a single electromagnet. That is (in part) how electrical motors work - they have multiple electromagnets inside them that turn on at different times.

[@christinaweibel7463]

Thank you for making this! It really helped give me a better understanding of how this works!

[@Aerros]

At the 0:45 second mark, the current is moving left to right? The compass also points to its opposite pole; therefore the north side of the electric current is below towards the viewer. Do you agree?

[@carterclemens7715]

I’m trying to make a prepectual motion machine even though it won’t work I still thought it would be a fun project to work on. It includes electromagnets and this helped me understand how they work. Thank you and great job!

[@Nayromix1]

You failed ?

[@phillpauley6672]

Just a little knowledge from an old guy... Waste your time and money on better things. I've wasted way too much time and money on the exact same thing. It's never perpetual and it never works how you think it will no matter how great the idea should work. At best you'll come up with something just as efficient as everybody else and find out there's already a patent. Hobbies are great as long as it betters your life somehow but once it becomes a liability and cost too much... just stop. I've been there and done that. Do better.

[@anni-riin3254]

This video is going to single handedly save my physics grade this year lol.

[@benjaminmiddleton165]

Great video, many thanks!

[@2hundred475]

this helped on my science project, thanks bro

[@hippogjoe]

Very thorough

[@Breyerlover4ever23]

Great video, helped a lot!

[@rangiroa100]

Hi Ben Finio. I have three questions. 1) If you take that same iron bolt with the same copper wire and with equal number of copper wire turn but the battery is 12 volt instead of 6 Volt, then would the electromagnet be stronger and if so then how much stronger? 2) When creating an electromagnet, what is the maximum voltage should be use to make the magnet stronger and at the same time utilizing less current (The magnet is more energy efficient) ? 3) If you use a Neodymium (rare earth) magnet and wrap a coil around it like you did and you use the same 6 Volt battery as you demonstrated on the video, then would the magnet be stronger or would it remain the same?

[@Science.Buddies]

Hi - if you are a K-12 student doing a science project, you can ask these questions in the Ask an Expert forums on our website and our volunteers will be able to help you. Otherwise, more general online science forums like Reddit or StackExchange may be able to help.

[@ojipokiD]

i made a new acount and i can see me resetting my watch history

[@mohammedadam1773]

That actually helped a lot thank you.

[@Science.Buddies]

You're welcome!

[@technologyexplained]

Electromagnet easily and nicely explained!!

[@yemisijames9138]

Great explanations. thanks

[@Science.Buddies]

You're welcome!

[@ajumonah7844]

So help for give me the knowledge

[@deku2651]

It helped me alot

[@albertlee8537]

Thanks for the video as well as the warning at the end about not using just the paper cylinder. With the wrong type of wire or low number of turns, this is a short circuit. Be careful!

[@gameofpawns2264]

You state magnetism can be increased by increasing the length of the wire. If you increase the copper wiring from 1 foot to 100,000 feet on say a 3v battery setup, would that decrease the magnetism or make it stronger considering voltage drop in the equation?

[@Science.Buddies]

For very long wires, like you mentioned, the resistance of the wire is not negligible, so you're correct - eventually, for the same battery, the current through the wire would decrease and so would the magnetic field strength. For relatively short lengths of wire, where the resistance is comparable to the internal resistance of the battery itself, in practice you should see that adding more coils makes the magnet stronger.

[@Coolgiy67]

Electrical engineer here, it would make it Weaker. Adding more turns of wire will increase the inductance thus increasing the impedance which lowers the overall current

[@barry2718]

@@Coolgiy67 the inductance only applies if an AC voltage (or current) is applied. Its DC so the internal resistance of the battery probably determines the maximum current. The magnetomotive force is determined by the N times I factor. The experiment should be done with a constant current power supply in order to compare strength of magnet versus number of turns of wire with current constant. The bolt should be a soft iron core or better a ferrite rod.Steel will retain some of the magnetism and skew the results.

[@FrJoshh]

Me like video😊 very good job you have done in the magnet its very powerful and i approve that me likes this video 😅

[@golexgames5094]

this is very useful

[@mizaeshafa9628]

thank u so muchhhh for this i understand it so much better now

[@jordanclark1333]

Your the Bill nye of youtube! Great video!

[@WiryOcean976]

I have a question, if it was possible to move electricity without the use of wires, AKA just make a ball of electricity in the air, would it have an electromagnetic current?

[@Science.Buddies]

Yes, electrical current is defined as the net flow of electrical charge through a surface (like the cross-section of a wire), but it does not actually matter it is inside a wire. For example it could be through air (e.g. lightning) or a liquid (the electrolyte in a battery).

[@thegoldenblock7906]

well, i would like to know if this would be able to pull like a tiny metal robot or something, assuming you maybe applied 20v?

[@MaxGiganteum]

-- This may be late in coming but one of the techniques used to remove ferrous based metal slivers, shavings or chunks from human flesh and/or human eyeballs is to employ an electromagnet. In many situations, such as when there is a large amount of shrapnel embedded due to the explosion of an IED, an electromagnet is often used because it is viewed as the best way to get the shrapnel out while causing the least amount of additional damage to the body. Does this technique actually work? Of course it does, that's exactly why it's used. Best wishes! - Max Giganteum

[@mehtakirti1]

How long at a stretch you can keep the magnet on without heating the coil

[@Science.Buddies]

The coil will begin heating up immediately. We recommend not touching the coil directly and only operating the magnet as a demonstration for a few seconds at a time.

[@gracey8442]

Thanks you really helped me guy I don’t know

[@williammotherway4343]

If the electromagnet is holding a paper clip, and I reverse the current, will there be enough latent "permanent" magnetism in the paper clip for the electromagnet to propel the paper clip away from it? Or will the paper clip just drop?

[@Science.Buddies]

We haven't tried this, but it sounds like a good topic for an experiment!

[@hussainattique2201]

Good video

[@zakiosman8757]

فكرت فى جعل المغناطيس الكهربى الواحد متعدد المستويات من حيث عدد لفات الملف لكنى خائف من انه قد يولد حرارة من وصل وفصل التيار مثلا 1000 مرة فى الدقيقة ربما يتحول الى سخان حثى

[@gdwilliam2841]

im here just because im gonna have a test next Thursday

[@dessalewbirlew1904]

Thank you very much to disseminate the info towards the people who are interested to upgrade their selve !!!

[@therabbithat]

awesome ! Thank you :)

[@syedmuhamedbasheers4959]

can we use a insulated wire to stop the heating

[@Science.Buddies]

Hi - you need to use insulated wire to prevent short circuits between the adjacent coils of wire in the electromagnet. However, this will not stop the wire from getting hot.

[@syedmuhamedbasheers4959]

@@Science.Buddiesyeah I get it thanks.

[@Legit_India]

Can we make the experiment with a 7volt dc battery

[@Science.Buddies]

You can try this with different types of batteries, just be careful as large batteries can provide large amounts of current and make the wire very hot. You should only connect the electromagnet for short periods of time.

[@golexgames5094]

my progect was about cool space magnets

[@deadeye_john]

What if the wires are superconducting wires? Will the magnetic field be the same with no resistance in the wires?

[@Science.Buddies]

Good question! Since superconducting wires have no resistance, they can conduct much larger currents than normal wires, therefore generating larger magnetic fields. However, room-temperature superconductors do not exist (yet), so the magnets must be cooled to very low temperatures in order to operate. You can read more about them here: en.wikipedia.org/wiki/Superconducting_magnet

[@deadeye_john]

@@Science.Buddies Is it because the strength of the magnetic field is proportional to the amount of current in the wires for the superconducting magnet?

[@arshil]

1:26 someone explain

[@boofang10]

Nicely illustrated !! 😁👍🏻👍🏻

[@mikeoxlong7607]

Can I use stainless steel? Or it should be Iron?

[@Science.Buddies]

It depends on the type of stainless steel - see this article for more details: www.scientificamerican.com/article/why-dont-magnets-work-on/

[@mikeoxlong7607]

@@Science.Buddies My plan is I will coil the wire in a screwdriver but the coil of wire cover only 1/4 of the screw I will use two 1.5 volts of battery will it work ? or I need more batteries

[@Science.Buddies]

@@mikeoxlong7607 it depends on what you're trying to lift - the best thing to do is just test it and find out!

[@mikeoxlong7607]

@@Science.Buddies I just want to turn on and off the magnet in screwdriver. I tried it but it didn't work.

[@mikeoxlong7607]

@@Science.Buddies Do more turns of wire makes a stronger magnet?

[@Ericapires12]

Nice

[@ananddhotre6722]

nice videoes....

[@evanmastermind]

That grade 8 hardware tho.

[@NiyobuhungiroEmmanuel-w6d]

What help electro magnet

[@sofyadzulazmi8597]

Tq

[@optionalroux4347]

my physics teacher has us use this lol

[@vibula7569]

A fumar al bar

[@matthewdoesyoutube7076]

but would that make a short circuit?

[@Science.Buddies]

You're using a very long piece of wire, so it has a higher resistance than a short piece that you could directly connect the battery terminals with. However, enough current flows that the wire will still start to get hot, so it's best not to leave the electromagnet connected for long periods of time.

[@ContentCalvin]

I need a magnet to open a safe and this I can rig up as opposed to buying an expensive magnet off eBay or having a key made my batteries died and I lost the keys long ago

[@karishmaantu6063]

Ugh I have to make one for my project

[@smartyrobot8816]

Good, l make a electromagnet. But I don't know how it works

[@edvynhayashi]

But why is mine still sooo weak?

[@otty8530]

Sym

[@abhinavsidharthkamineni8943]

What up

[@abhinavsidharthkamineni8943]

Hood

[@liubomirwm]

Watch this video after this one: kzbin.info/www/bejne/nnekgIuajb9oiq8

[@maimarthaelias9957]

I don't understand

[@ankitmakwana3141]

NYC1

[@zaeem9736]

Hot boy jinish

[@cavespidergamingyt]

Please dumbify this

[@williamisaiahsimmons1706]

Didn't work that sucked

[@williamisaiahsimmons1706]

right

[@justamcplayer]

?

[@Jakec_SLO]

you should use insulated wire

[@musicadda3154]

I do not

[@AndrewKevin-qq5bi]

im gay

[@bbqsauceonmytt]

doesn’t make sense

[@abhinavsidharthkamineni8943]

Ggo

[@lleraimm]

No me gusta

[@yyhhttcccyyhhttccc6694]

dident work