Make Your Own Electro-Magnet

Submitted by: Delpitos 10 years ago in Science
/media/30651_makeamagnet.flv
All you need is a battery, some wire, and a screw.
There are 46 comments:
Female 1
I teach Mad Science to grade school kids and we have an electric magnet along this line.. You need metal, battery and +&- wire so this method shound work
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Female 46
that was so cool
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Male 5,194
>i did that in like 3rd grade

No you didn`t. This doesn`t work, it`s a scam to see how many people are stupid enough to think it works like that. Looks like there are QUITE a few.

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Male 1,725
ya its definately fake i tried it and i could get it without the battery
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Female 65
I just did a science project almost exactly like this last week.
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Male 65
Guys...this is fake. The stripped wire is just picking up the screw by a thread. The circuit is open, no electricity flows through, no magnetic field.
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Male 239
I cant think of a use for an electro-magnet. But it seems pretty easy. So I guess i could try it out if I was realy bored.
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Male 374
i did this in fifth grade.
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Male 173
If it was an elctro-magnet, The screw would come up to the battery and stay there. It floating shows that it`s not :)

And electricity doesn`t pass through mose objects, but around it. Hence an electromagnetic field (Even your muslces make electromagnetic fields)but I see no circuit (A circuit can be made with air, but not when it`s that weak)

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Male 230
I love how it doesn`t work. :)
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Male 701
man...how does this make it on here? I have tried to post thing a lot more interesting than this and it didn`t make it on.
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Male 14
An electromagnet does involve a closed circuit making loops around a metal object. That wouldn`t have worked. The magnetic field created by the wire isn`t strong enough to hold a screw in the air. Just wrap the wire around the screw as much as possible then attach it to both ends of the battery and see if it attracts another screw.
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Male 1,343
did anyone else notice that when he moved the battery away from the screw, it neither came closer to the battery nor the ground? also there was no complete circuit, so it is fake.

im pretty sure that you would have to wrap the copper wire around the metal, apply electricity, and then touch the metal to the object you wanted to pick up...

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Male 332
I`ll agree with the fact that this is a fake, but the statement about air as an insulator is moronic. Air is a great insulator for electricity, but a magnetic field isn`t electricity, and doesn`t even need a medium to propagate.
Oh, and the coil around the screw thing works without the screw, as an electromagnet is a current passing through a coil, but the screw increases the power of the field.
And yes, any wire transmitting current makes an EM field, but in order for it to have magnetic poles, it needs to be in a coil.
Also, the levitation distance is impossible to keep steady when you move the magnet like that, so there`s a thread.
Good news is, you can make an electromagnet with some wire and a battery anyways :P.
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Male 272
Note how at the beginning of attmepting this experiment, the wire slips. Oh yeah, that`s DEFINITELY an eletric current. -.-`
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Male 110
... Reminiscent of "putting cabbage in water= magnetic water" or that thing that stands the spoon on end... Because no complete circuit actually formed: this is not an electromagnet. Whether other things were magnetized...

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Male 741
ok, this is 7th grade science class ><. Who ever doesnt know this has the knoledge of a 10 year old
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Male 2,781
WHOA!!! THAT`S WAY AWESOME!!!
I`M GONNA INVENT A BADASS HOVERCAR USING THIS CONCEPT.
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Male 70
D
U
M
B
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Male 561
no wonder y the site is called I am bored
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Male 201
This could not be an electro-magnet because the circuit is open and there is no currant. No currant = no magnetic field. There is however, an electric field between the batterie cap and the screw tip.

The potential difference is only 1.5V so the electric field would be rather low. However, since the tip is very pointy, there would be a field effet at this point that could make the field high enough to result in an observable attractive force.

I tried it, but I did not have the exact same material. I was not able to observe the effet.

Even thow is would there IS an electric (not magnetic) atractive force between the screw tip and the battery, it is probably not stong enough to lift the screw. This is probably BS.

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Male 1,386
i did something like this is science class, but we wrapped the wire around the screw and but both ends of the wire to the battery. or something like that
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Female 2,552
Awsome.
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Male 60
I think I remember doing that when I was 12. Except I ran it off the mains and melted the wires.
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Male 498
hmm pretty cool
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Male 361
aww give him a brake hes still in the 2nd grade hes just showin off to his 8 year old friends ^_^
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Male 5,194
>i did that in like 3rd grade

No you didn`t. This doesn`t work, it`s a scam to see how many people are stupid enough to think it works like that. Looks like there are QUITE a few.

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Female 600
Yawn...still bored.
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Male 51
lerber3 is correct, this is a trick since air is an excellent insulator. Try this, put your hand near an electric outlet. Notice how you don`t get shocked? You`ve now performed a science experiment proving the insulating properties of air.

Yes, the screw is being held by the wire on a thread.

To make an electo-magnet, wrap the wire around the screw and connect the ends of the wire to each end of the battery.

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Male 2,057
nah, thats just pointless
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Female 9
is there ANYONE who didnt do this in science class??? i mean, i did that in like 3rd grade
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Male 375
it didnt say it was an electromagnet...reread, genius. what i said was that a current through a wire creates a magnetic field. i also qualified my statement with the fact that there need to be certain characteristics.

but the fact remains: ANY electrical current creates a magnetic field.

I didnt speak to the strength of the field at all

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Male 47
This would not have worked with a nail... it has to be a screw. Why? Because you can pick a screw up with a wire by catching a thread. No circuit was formed. Sorry NyQ, it`s not an electromagnet... it`s a trick.
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Male 68
I always thought you made an electromagnet by wrapping a piece of iron (i.e.- a nail) with a copper coil and then making a complete electric circuit through it. In other words, the wire would have to be touching the cathode and the anode on the battery.
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Female 180
Sucky! He tried to demonstrate the screw moving toward the magnetic force and it barely worked.
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Male 68
I don`t think it would work, but I could be wrong. I don`t know much about electro-magnetic fields, but I didn`t think simply passing a current through a wire created a magnetic field. At least not one strong enough to pick up anything. I mean, if that were the case, I shouldn`t have to worry about losing sockets in my engine compartment because the magnetic field should keep them from going anywhere I don`t intend them to go.
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Male 1,142
next how to make a paper air plane cause none of us know how do to that either.
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Male 74
I am bored.
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Male 382
Awh come on, I did this in school when I was about 9!
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Male 410
Gee...that was boring. How ironic.
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Male 151
You want a good science project? Check out the `How to make cocaine` link!
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Male 149
^You must be really bad at science projects, cause that`s horrible.
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Female 229
Good idea for a science project
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Female 284
or i could just pick it up with my fingers
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Male 2,513
¡Præty næt!
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Male 5
Link: Make Your Own Electro-Magnet [Rate Link] - All you need is a battery, some wire, and a screw.
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