Introduction: Magnetic Field

This very simple electric motor is called a homopolar motor because the magnetic field does not change direction or strength. With only three parts, it is probably the simplest motor you can possibly make.

Comments

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angryrobot17 (author)2013-11-09

Can you use any size magnet and any sized battery?

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timmy1234s (author)2008-08-09

Im speechless(in a good way) By the way, where would you get the stiff copper wire and sculpt it?

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Fred_Sanford (author)timmy1234s2012-09-08

Like FireCrazyAlchemist said, you could use a wire hanger, just scrape off the coating and make sure you have continuity

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ReCreate (author)timmy1234s2009-05-17

You can Sometimes Find it in Transformers,One is Long,And One is short,and Stiff. You could also Try CAT5,It has copper wire.

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pradipta03 (author)2012-03-03

Cool indeed.

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fpermata (author)2011-04-05

it was cool, awesome, marvelous, i want to try it

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powerfool (author)2009-09-21

Hi, it's really nice! But can you give us any tips on how to bend the wire like the shapes you have made, without getting very frustated?

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rfriedman28 (author)powerfool2010-08-17

You can use needle nose pliers. Sometimes called, Jewelry pliers. They can make small, sharp curls and designs.

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arriero4x4 (author)2010-05-31

 great Idea., I doit it with my kids :)

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karimm795 (author)2010-04-09

can i use a paper clip ?

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alvin9861 (author)2009-12-23

I found that if you put small dent in top of battery, it keeps the wire in place so doesn't fall off. Use a small nail or something with a with a point. Don't hit to hard or it will punch a hole in battery.

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arzarach (author)2009-06-01

Where did you get the idea to make this. Its pretty cool. Do you have any other magnet tricks.

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Don,t try this at home (author)2009-05-19

can you use a hanger

author

Yes just make sure you scrape off all the coating on it

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dfred93 (author)2009-05-16

with thease do you have to change the battery much...im trying to make one with cds and batteries that spins with magnetic power

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knight life (author)2009-03-05

Please tell me How to see the video , I can not open it , it is just gray .

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PyroMaster007 (author)2009-02-10

so as long as the wire touches both ends it works?

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Mr.NHRA (author)2009-02-04

Does it drain the batt or just utilize the electrical feild?

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ItsTheHobbs (author)2009-01-11

Nice thats a really neat one.

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von rad (author)2008-12-26

Nicely done!

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dimmu1313 (author)2008-12-21

In case anyone is interested, the reason this works is because, first, the permanent magnet is made of electrically conductive material. If you notice, the bottom of the copper "rotor" is touching the magnet, which is also the negative electrical terminal. Since current is flowing through the wire a magnetic field is setup around the wire. This new magnetic field, due to its overall shape (based on the shape of the wire) allows for an attraction and/or opposition force (in the case of the "rectangular" rotor, it is both forces, which is why it has the highest acceleration) to move the wire.

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kemog (author)2008-12-21

THANK YOU man !!!

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Migacz (author)2008-12-16

I tried this, it did not work. Does the wire need to be de- insulated or do I need a better magnet? The magnet is round so I don't know why it isn't working.

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AznPanda (author)2008-08-15

Kool last one could become a fan! =D a mini fan

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leebryuk (author)2008-05-09

That was a fun presentation. Simple and to the point. No muttering explanations either. The minimalism was appropriate. Good job!

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Arbitror (author)2008-05-02

Totally AWESOME!

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shortydog (author)2008-04-29

Awsome. It's so simple too.

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adamvs (author)2008-04-13

Brilliant! I also like the elegance of the presentation. It looked like it was a short from Discovery channel. Very cool

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awkrin (author)2008-04-11

10/10 really cool thing

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pyro 360 (author)2008-03-13

NICE! ill mod it to make a car! thanks!

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footballgirl004 (author)2008-02-28

thats pretty cool