# Re: I have a problem, maybe you can help me.....

From: On-line Snack discussion (snaktalk)
Date: Wed Mar 08 2000 - 20:43:08 PST

anyone has advice for you, they'll let you know.

Nina Thayer
Snacktalk Moderator
>
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> Hello, snack team!
> I have a slight problem concerning electro-magnetism....hopefully you =
> can give me an advise. I am a student in Switzerland and I need to =
> create an electromagnetic field which I can switch on and off. I have a =
> slight Idea how this could work, but the problem is, that the current =
> has to come from a battery because it has to be portable. So I might =
> have to include a transformer or any other equipment to get the =
> sufficient amount of current for the field. This problem goes beyond my =
> physical knowledge even if I am always trying to keep on improving it.=20
> Another problem is, that the field has to cover a surface of a circle =
> with a radius of 30 cm. The intensity/ force has to be nearly the same, =
> if you have a weight of 100 gramm would hang down from it. The contact =
> area between the surface and the 100 gramm weight would be around a =
> circle with a radius of 3 to 4 cm. the field would have to be able to =
> hold around 10 to 12 times this little circles on the big surface. For =
> me this sounds totally impossible, like a kind of science fiction, =
> because the whole thing should not have more weight than 1 Kg!!!
> I thought already about a small strong Lithium battery with a =
> transformer as surce of the current, and to generate the field about a =
> "thin" metall wire, which is rolled like a flat spiral to cover the =
> surface of the big 30 cm radius circle.
> I know this sounds like the dream of a beginner, but maybe you can think =
> about a possibility to make it work. I would be the most happy guy on =
> the planet if you would have a solution for me....
> I am looking forward hearing from you soon
> Carsten
>
> P.S.: I hope I was able to explain to you what my cocern is about, =
> because since my mother tongue is not english, I don't know if I used =
> the correct scientific terms to describe my problem. If you need more =
> immediately...
>
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> <DIV><FONT color=3D#000000 size=3D2>Hello, snack team!</FONT></DIV>
> <DIV><FONT color=3D#000000 size=3D2>I have a slight problem concerning=20
> electro-magnetism....hopefully you can give me an advise. I am a student =
> in=20
> Switzerland and I need to create an electromagnetic field which I can =
> switch on=20
> and off. I have a slight Idea how this could work, but the problem is, =
> that the=20
> current has to come from a battery because it has to be portable. So I =
> might=20
> have to include a transformer or any other equipment to get the =
> sufficient=20
> amount of current for the field. This problem goes beyond my physical =
> knowledge=20
> even if I am always trying to keep on improving it. </FONT></DIV>
> <DIV><FONT color=3D#000000 size=3D2>Another problem is, that the field =
> has to cover=20
> a surface of a circle with a radius of 30 cm. The intensity/ force has =
> to be=20
> nearly the same, if you have a weight of 100 gramm would hang down from =
> it. The=20
> contact area between the surface and the 100 gramm weight would be =
> around a=20
> circle with a radius of 3 to 4 cm. the field would have to be able to =
> hold=20
> around 10 to 12 times this little circles on the big surface. For me =
> this sounds=20
> totally impossible, like a kind of science fiction, because the whole =
> thing=20
> should not have more weight than 1 Kg!!!</FONT></DIV>
> strong Lithium=20
> battery with a transformer as surce of the current, and to generate the =
> field=20
> about a &quot;thin&quot; metall wire, which is rolled like a flat spiral =
> to=20
> cover the surface of the big 30 cm radius circle.</FONT></DIV>
> <DIV><FONT color=3D#000000 size=3D2>I know this sounds like the dream of =
> a beginner,=20
> but maybe you can think about a possibility to make it work. I would be =
> the most=20
> happy guy on the planet if you would have a solution for =
> me....</FONT></DIV>
> <DIV><FONT color=3D#000000 size=3D2>Thank you very much in advance for =
> <DIV><FONT color=3D#000000 size=3D2>I am looking forward hearing from =
> you=20
> soon</FONT></DIV>
> <DIV><FONT color=3D#000000 size=3D2>Carsten</FONT></DIV>
> <DIV><FONT color=3D#000000 size=3D2></FONT>&nbsp;</DIV>
> <DIV><FONT color=3D#000000 size=3D2>P.S.: I hope I was able to explain =
> to you what=20
> my cocern is about, because since my mother tongue is not english, I =
> don't know=20
> if I used the correct scientific terms to describe my problem. If you =
> need more=20