Tido611 said:
I can't find any sort of charts for the stregths of different metals that i could use as the core for my Electro Magnet(EM).
some plans for a E.M. would be kinda cool to see too if anybody has any.
(also, this is my first post on this site and i am really excited because I've been lookin for a quality site like this for a long time. and i know that i will be asking a lot of questions because i still have a lot to learn.
http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
Here is a helpful sight on what you want to know. Hyperphysics is a absolutely splendiferous site, and you will probably be directed to it many times.
And this is what you specifically asked for, a table of relative
permeabilities for various paramagnetic, diamagnetic, and ferromagnetic core materials:
http://hyperphysics.phy-astr.gsu.edu/hbase/tables/magprop.html#c2
An iron nail with tightly wrapped magnet wire around it works well as a first electromagnet. And later maybe you can work your way up to an NMR!
http://www.cis.rit.edu/htbooks/nmr/chap-7/chap-7.htm#7.2
Before you can start with the construction of an electromagnet, you first need to figure out the following:
1. What will the core be made of
2. What magnetic flux density are you trying to achieve
3. How many turns will be required for this along with
4. How many amps will be flowing through the wire
5. How big will the wire have to be to handle the current
6. How much surface area will you have for cooling the coil
7. How big will the electromagnet be due to the above
8. What voltage rating will the insulation of the wire have to withstand
9. What will be the inductance of the electromagnet
10. Obtain the core, wire, bobbin (form for the winding)
11. Wind the coil
12. Test the electromagnet
Or you could just do it, and test the strength.
http://search.ebay.com/search/searc...s/&fkr=1&from=R8&satitle=Neodymium&category0=
Neodymium magnets are worth the money, I have 25 in my bedroom and they are awesome. You can easily amaze your friends, family, and yourself over and over again. But with power comes a price. They shatter easily, and its likely if you drop one more than once it will break up into pieces. It hurts like hell if flesh gets in between two magnets, afterwards there is a bruise. And don't bring them near any sharp objects, what am I saying? Its all in the handbook you get if you buy it.
Wikilinks:
http://en.wikipedia.org/wiki/Electromagnet
http://en.wikipedia.org/wiki/Solenoid
From powerlabs, stuff you'll never do, but its really fun to read about.
http://powerlabs.org/highvoltage.htm
http://powerlabs.org/emguns.htm