| Topic: |
Science > Physics |
| User: |
"" |
| Date: |
06 Oct 2005 06:38:20 PM |
| Object: |
Using electricity to repel an object? |
Is this possible? If I have two metal objects (you name the metals
even) touching a little, can I wrap a wire around part of one of them,
electrify it, and have it repel the other object? Note that I want the
wrapping and electrifying to be what does it and the objects have to
touch originally touch (otherwise I'd just try to stick the South
ends of two magnets together - Look, they CAN'T TOUCH).
.
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| User: "Order of the Solar Temple" |
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| Title: Re: Using electricity to repel an object? |
06 Oct 2005 10:12:54 PM |
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<janey3white@yahoo.com> wrote in message
news:1128641900.291847.11930@z14g2000cwz.googlegroups.com...
Is this possible? If I have two metal objects (you name the metals
even) touching a little, can I wrap a wire around part of one of them,
electrify it, and have it repel the other object? Note that I want the
wrapping and electrifying to be what does it and the objects have to
touch originally touch (otherwise I'd just try to stick the South
ends of two magnets together - Look, they CAN'T TOUCH).
It is done all the time in electric motors.
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| User: "Sam Wormley" |
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| Title: Re: Using electricity to repel an object? |
06 Oct 2005 06:44:46 PM |
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wrote:
Is this possible? If I have two metal objects (you name the metals
even) touching a little, can I wrap a wire around part of one of them,
electrify it, and have it repel the other object? Note that I want the
wrapping and electrifying to be what does it and the objects have to
touch originally touch (otherwise I'd just try to stick the South
ends of two magnets together - Look, they CAN'T TOUCH).
http://www.google.com/search?=electromagnetic
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| User: "G=EMC^2 Glazier" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 05:13:20 PM |
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Hi Sam This kind of gives you thoughts on "Maglev Train" Magnetic
fields to levitate it above the iron tracks. Than a Linear induction
motor needed. Coils on the train generate a magnetic field in which the
poles shift along the train. The field induces electric currents in the
reaction rail,which in turn generates it own magnetic field Thus the two
fields interact so that the shifting field pulls the "floating" train
along the track. Clean, fast,silent,and a good idea to know japanese.
Bert
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| User: "" |
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| Title: Re: Using electricity to repel an object? |
06 Oct 2005 06:51:08 PM |
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Sure wouldn't make much of a teacher, would you, Wormley?
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| User: "Gregory L. Hansen" |
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| Title: Re: Using electricity to repel an object? |
09 Oct 2005 08:30:18 PM |
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In article <1128641900.291847.11930@z14g2000cwz.googlegroups.com>,
<janey3white@yahoo.com> wrote:
Is this possible? If I have two metal objects (you name the metals
even) touching a little, can I wrap a wire around part of one of them,
electrify it, and have it repel the other object? Note that I want the
wrapping and electrifying to be what does it and the objects have to
touch originally touch (otherwise I'd just try to stick the South
ends of two magnets together - Look, they CAN'T TOUCH).
It would be an application of Lenz's law.
http://www.launc.tased.edu.au/online/sciences/physics/Lenz's.html
http://my.execpc.com/~rhoadley/magring.htm
You might need a heckuva lot of current flowing through the wire, and it
would have to be AC. But sure, possible in principle.
--
"Voice or no voice, the people can always be brought to the bidding of
the leaders. This is easy. All you have to do is to tell them they
are being attacked, and denounce the pacifists for lack of patriotism
and exposing the country to danger." -- Hermann Goering
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| User: "G=EMC^2 Glazier" |
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| Title: Re: Using electricity to repel an object? |
10 Oct 2005 08:08:35 AM |
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Light repels electrons up to 99.999 of 'c' Electricity can't match that
repelling speed. Its no wonder the photon is a force particle. Bert
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| User: "" |
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| Title: Re: Using electricity to repel an object? |
10 Oct 2005 07:06:55 PM |
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OK. I think I have this. This isn't what I started out to want, but it
may have to do. So . . . if I take a Diamagnetic metal (copper), wrap
it in a coil, and electrify it, then took, say, iron, coiled it, and
electrified that as well, I would have two things that would repel,
right? Or would I not have to fuss with the iron. Would it repel
without having been wrapped and electrified?
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| User: "Gregory L. Hansen" |
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| Title: Re: Using electricity to repel an object? |
10 Oct 2005 08:24:21 PM |
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In article <1128989214.980583.20250@g43g2000cwa.googlegroups.com>,
<janey3white@yahoo.com> wrote:
OK. I think I have this. This isn't what I started out to want, but it
may have to do. So . . . if I take a Diamagnetic metal (copper), wrap
it in a coil, and electrify it, then took, say, iron, coiled it, and
electrified that as well, I would have two things that would repel,
right? Or would I not have to fuss with the iron. Would it repel
without having been wrapped and electrified?
Depending on the directions of the currents, they would repel. It really
wouldn't matter at all whether the slug of copper is in the coil or not,
the iron would be repelled by the magnetic field created by the solenoid
that the copper is in, not by the induced field of the copper.
Diamagnetism or paramagnetism aren't really something you would apply in
practice. Sure, you can levitate a frog with a strong enough magnetic
field, but that's extraordinary enough to get written up in the
newspapers with caveats that we can't do the same to humans. That's
hardly a basis for a commercial application. Lenz's law drives many
motors in common use, and can shoot projectiles in excess of a kilometer
per second. Apply an AC field and you won't need the iron or the second
solenoid to repel the copper. Google for "jumping ring".
--
"The average person, during a single day, deposits in his or her underwear
an amount of fecal bacteria equal to the weight of a quarter of a peanut."
-- Dr. Robert Buckman, Human Wildlife, p119.
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| User: "The Ghost In The Machine" |
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| Title: Re: Using electricity to repel an object? |
06 Oct 2005 10:00:07 PM |
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In sci.physics,
<>
wrote
on 6 Oct 2005 16:38:20 -0700
<1128641900.291847.11930@z14g2000cwz.googlegroups.com>:
Is this possible? If I have two metal objects (you
name the metals even) touching a little, can I wrap a
wire around part of one of them, electrify it, and have
it repel the other object? Note that I want the wrapping
and electrifying to be what does it and the objects have
to touch originally touch (otherwise I'd just try to
stick the South ends of two magnets together - Look,
they CAN'T TOUCH).
I'm not entirely sure exactly what you're trying to do here, but
an old-fashioned electroscope shows that like charges do repel, and
is occasionally used to indicate the voltage on its terminal. The
main problem of course is that there's no calibration. (The
working bits of an electroscope look like a hinged V, and it's
all made out of metal -- thin foil, usually, though it's not too
important as long as it's conductive. The central rod attaches
to the hinge of the V and comes out through an insulated stopper,
and can be touched by, say, a rubbed insulating rod.
A very cheapie version can probably be made by bending a
paper clip so that there are two "pivots" close together
and fashioning foil "clips" (by slightly coiling one end
into a U-shape) so that they can pivot, then sliding
them onto the edges of the bent clip. The clip can then
be nailed, screwed, etc. to something noninsulating -- wood
is probably simplest.
A side view and a front view might look a bit like this:
| |
| w |
|| o | +-+
|| o | |x|
-+-+--+| d | * *
|*| | | | |
|*| | | | |
+-+ | | + +
| |
where 'x' marks the nail, screw, etc.
One can then rub an amber or rubber rod and play with the
electroscope by touching the top part of the paper clip
(touching the actual foils is also doable but is slightly
pointless).
Disclaimer: I've not tried this. No doubt there are better
models out there (not to mention better drawings!).
--
#191,
It's still legal to go .sigless.
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| User: "" |
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| Title: Re: Using electricity to repel an object? |
06 Oct 2005 07:01:26 PM |
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Metal = steel.
You contradict yourself, you say the they must touch in one section of
your specs, in the other you say they can't touch. But it doesnt
matter, you can get repulsion either way.
You can get either normal magnets or electromagnets to repel by
aligning the same poles (N to N, or S to S) with each other.
You need to read and correct your request.
- Don
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| User: "Jan Panteltje" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 06:22:30 AM |
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On a sunny day (6 Oct 2005 16:38:20 -0700) it happened
wrote in <1128641900.291847.11930@z14g2000cwz.googlegroups.com>:
Is this possible? If I have two metal objects (you name the metals
even) touching a little, can I wrap a wire around part of one of them,
electrify it, and have it repel the other object? Note that I want the
wrapping and electrifying to be what does it and the objects have to
touch originally touch (otherwise I'd just try to stick the South
ends of two magnets together - Look, they CAN'T TOUCH).
If you have 2 pieces of iron, you can wind 2 coils, one on each of them,
that will give you 2 electromagnets, and all tricks a magnet does these can.
So, depending on the polarity, (current direction) of the coils these will
repel or attract.
You can also use one permanent magnet and one coil, even simpler, actually that
is what you find in a loadspeaker.
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| User: "" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 07:07:53 AM |
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Jan Panteltje wrote:
If you have 2 pieces of iron, you can wind 2 coils, one on each of them,
that will give you 2 electromagnets, and all tricks a magnet does these can.
So, depending on the polarity, (current direction) of the coils these will
repel or attract.
You can also use one permanent magnet and one coil, even simpler, actually that
is what you find in a loadspeaker.
I think this is close to what I want. But can it be done by wrapping
just one of the pieces of iron? What I want at the most basic level is
to wrap a piece of metal in wire, electrify it, and then have it repel
another (or the same) type of metal. It doesn't have to THROW that
second piece across the room, just give me the same repel effect I get
when I try to put two South ends of two magnets together. I.E. make it
impossible (or just really hard) for them to touch AFTER I have
electrified one.
.
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| User: "CWatters" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 12:08:46 PM |
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<janey3white@yahoo.com> wrote in message
news:1128686873.540277.131870@z14g2000cwz.googlegroups.com...
Jan Panteltje wrote:
If you have 2 pieces of iron, you can wind 2 coils, one on each of them,
that will give you 2 electromagnets, and all tricks a magnet does these
can.
So, depending on the polarity, (current direction) of the coils these
will
repel or attract.
You can also use one permanent magnet and one coil, even simpler,
actually that
is what you find in a loadspeaker.
I think this is close to what I want. But can it be done by wrapping
just one of the pieces of iron?
You mean like using an Electromagnet to repel a permanant magnet?
.
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| User: "Androcles Androcles@ MyPlace.org" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 12:14:38 PM |
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"CWatters" <colin.watters@pandoraBOX.be> wrote in message
news:yYx1f.15878$Ah4.811059@phobos.telenet-ops.be...
|
| <janey3white@yahoo.com> wrote in message
| news:1128686873.540277.131870@z14g2000cwz.googlegroups.com...
| >
| > Jan Panteltje wrote:
| >
| > > If you have 2 pieces of iron, you can wind 2 coils, one on each of
them,
| > > that will give you 2 electromagnets, and all tricks a magnet does
these
| can.
| > > So, depending on the polarity, (current direction) of the coils
these
| will
| > > repel or attract.
| > > You can also use one permanent magnet and one coil, even simpler,
| actually that
| > > is what you find in a loadspeaker.
| >
| > I think this is close to what I want. But can it be done by
wrapping
| > just one of the pieces of iron?
|
| You mean like using an Electromagnet to repel a permanant magnet?
|
|
LOL!
Androcles
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| User: "operator jay" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 02:42:00 PM |
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"Androcles" <Androcles@ MyPlace.org> wrote in message
news:22y1f.515$tS4.374@fe1.news.blueyonder.co.uk...
"CWatters" <colin.watters@pandoraBOX.be> wrote in message
news:yYx1f.15878$Ah4.811059@phobos.telenet-ops.be...
|
| <janey3white@yahoo.com> wrote in message
| news:1128686873.540277.131870@z14g2000cwz.googlegroups.com...
| >
| > Jan Panteltje wrote:
| >
| > > If you have 2 pieces of iron, you can wind 2 coils, one on each of
them,
| > > that will give you 2 electromagnets, and all tricks a magnet does
these
| can.
| > > So, depending on the polarity, (current direction) of the coils
these
| will
| > > repel or attract.
| > > You can also use one permanent magnet and one coil, even simpler,
| actually that
| > > is what you find in a loadspeaker.
| >
| > I think this is close to what I want. But can it be done by
wrapping
| > just one of the pieces of iron?
|
| You mean like using an Electromagnet to repel a permanant magnet?
|
|
LOL!
Androcles
Wouldn't it work? Using a dc electromagnet? Kind of like a wire deflecting
a compass needle?
.
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| User: "Androcles Androcles@ MyPlace.org" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 05:13:27 PM |
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"operator jay" <none@none.none> wrote in message
news:aeA1f.1948$lb7.21519@news1.mts.net...
|
| "Androcles" <Androcles@ MyPlace.org> wrote in message
| news:22y1f.515$tS4.374@fe1.news.blueyonder.co.uk...
| >
| > "CWatters" <colin.watters@pandoraBOX.be> wrote in message
| > news:yYx1f.15878$Ah4.811059@phobos.telenet-ops.be...
| > |
| > | <janey3white@yahoo.com> wrote in message
| > | news:1128686873.540277.131870@z14g2000cwz.googlegroups.com...
| > | >
| > | > Jan Panteltje wrote:
| > | >
| > | > > If you have 2 pieces of iron, you can wind 2 coils, one on
each of
| > them,
| > | > > that will give you 2 electromagnets, and all tricks a magnet
does
| > these
| > | can.
| > | > > So, depending on the polarity, (current direction) of the
coils
| > these
| > | will
| > | > > repel or attract.
| > | > > You can also use one permanent magnet and one coil, even
simpler,
| > | actually that
| > | > > is what you find in a loadspeaker.
| > | >
| > | > I think this is close to what I want. But can it be done by
| > wrapping
| > | > just one of the pieces of iron?
| > |
| > | You mean like using an Electromagnet to repel a permanant magnet?
| > |
| > |
| > LOL!
| > Androcles
| >
|
| Wouldn't it work?
Of course it will. I was laughing at the obviousness and subtlety
of Colin's reply. :-)
Using a dc electromagnet?
Definitely.
| Kind of like a wire deflecting
| a compass needle?
Exactly. A compass needle IS a magnet.
Androcles.
.
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| User: "operator jay" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 07:27:32 PM |
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"Androcles" <Androcles@ MyPlace.org> wrote in message
news:bqC1f.85854$RW.15597@fe2.news.blueyonder.co.uk...
"operator jay" <none@none.none> wrote in message
| Wouldn't it work?
Of course it will. I was laughing at the obviousness and subtlety
of Colin's reply. :-)
oh
.
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| User: "Androcles Androcles@ MyPlace.org" |
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| Title: Re: Using electricity to repel an object? |
08 Oct 2005 02:03:06 AM |
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"operator jay" <none@none.none> wrote in message
news:TpE1f.2003$lb7.21679@news1.mts.net...
|
| "Androcles" <Androcles@ MyPlace.org> wrote in message
| news:bqC1f.85854$RW.15597@fe2.news.blueyonder.co.uk...
| >
| > "operator jay" <none@none.none> wrote in message
|
|
| > | Wouldn't it work?
| >
| > Of course it will. I was laughing at the obviousness and subtlety
| > of Colin's reply. :-)
| >
|
|
| oh
|
|
pee
kew
are
ess
tee
you
vee haff vays off making u talk.
Your turn.
Androcles
.
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| User: "operator jay" |
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| Title: Re: Using electricity to repel an object? |
08 Oct 2005 10:07:47 AM |
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"Androcles" <Androcles@ MyPlace.org> wrote in message
news:KaK1f.7703$tS4.2120@fe1.news.blueyonder.co.uk...
"operator jay" <none@none.none> wrote in message
news:TpE1f.2003$lb7.21679@news1.mts.net...
|
| "Androcles" <Androcles@ MyPlace.org> wrote in message
| news:bqC1f.85854$RW.15597@fe2.news.blueyonder.co.uk...
| >
| > "operator jay" <none@none.none> wrote in message
|
|
| > | Wouldn't it work?
| >
| > Of course it will. I was laughing at the obviousness and subtlety
| > of Colin's reply. :-)
| >
|
|
| oh
|
|
pee
kew
are
ess
tee
you
vee haff vays off making u talk.
Your turn.
Androcles
pass
.
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| User: "Jan Panteltje" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 03:34:54 PM |
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On a sunny day (Fri, 7 Oct 2005 14:42:00 -0500) it happened "operator jay"
<none@none.none> wrote in <aeA1f.1948$lb7.21519@news1.mts.net>:
"Androcles" <Androcles@ MyPlace.org> wrote in message
news:22y1f.515$tS4.374@fe1.news.blueyonder.co.uk...
"CWatters" <colin.watters@pandoraBOX.be> wrote in message
news:yYx1f.15878$Ah4.811059@phobos.telenet-ops.be...
|
| <janey3white@yahoo.com> wrote in message
| news:1128686873.540277.131870@z14g2000cwz.googlegroups.com...
| >
| > Jan Panteltje wrote:
| >
| > > If you have 2 pieces of iron, you can wind 2 coils, one on each of
them,
| > > that will give you 2 electromagnets, and all tricks a magnet does
these
| can.
| > > So, depending on the polarity, (current direction) of the coils
these
| will
| > > repel or attract.
| > > You can also use one permanent magnet and one coil, even simpler,
| actually that
| > > is what you find in a loadspeaker.
| >
| > I think this is close to what I want. But can it be done by
wrapping
| > just one of the pieces of iron?
|
| You mean like using an Electromagnet to repel a permanant magnet?
|
|
LOL!
Androcles
Wouldn't it work? Using a dc electromagnet? Kind of like a wire deflecting
a compass needle?
Oh yes, every little electric motor that runs on batteries, every dynamic
loudspeaker uses that.
Even the dynamo in your bike does it in reverse (permantent magnet rotating
versus a iron core with coil), works as generator.
.
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| User: "Mark Martin" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 02:52:41 PM |
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operator jay wrote:
Wouldn't it work? Using a dc electromagnet? Kind of like a wire deflecting
a compass needle?
Yes it'll work. There's no important difference between the dipole
field of an electromagnet vs a permanent magnet. They will interact,
and in fact common electric motors/generators employ both kinds in this
way.
-Mark Martin
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| User: "tadchem" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 09:30:41 AM |
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wrote:
<snip repost>
... What I want at the most basic level is
to wrap a piece of metal in wire, electrify it, and then have it repel
another (or the same) type of metal. It doesn't have to THROW that
second piece across the room, just give me the same repel effect I get
when I try to put two South ends of two magnets together. I.E. make it
impossible (or just really hard) for them to touch AFTER I have
electrified one.
Ferromagnetism doesn't work that way.
If you magnetize only one piece of ferromagnetic metal with a coil,
then it will attract the other piece of metal.
Diamagnetism works the other way.
Get a piece of iron and a piece of diamagnetic material (bismuth is the
most diamagneti material known so far). Wrap an electric current
around the iron and it will become a magnet. The magnet will *weakly*
repel the diamagnetic material. Most materials are diamagnetic. This
fact has been used to perform some interesting magnetic levitation
experiments:
http://www.hfml.science.ru.nl/levitation-movies.html
Tom Davidson
Richmond, VA
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| User: "Randy Poe" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 03:40:55 PM |
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wrote:
Jan Panteltje wrote:
If you have 2 pieces of iron, you can wind 2 coils, one on each of them,
that will give you 2 electromagnets, and all tricks a magnet does these can.
So, depending on the polarity, (current direction) of the coils these will
repel or attract.
You can also use one permanent magnet and one coil, even simpler, actually that
is what you find in a loadspeaker.
I think this is close to what I want. But can it be done by wrapping
just one of the pieces of iron? What I want at the most basic level is
to wrap a piece of metal in wire, electrify it, and then have it repel
another (or the same) type of metal. It doesn't have to THROW that
second piece across the room, just give me the same repel effect I get
when I try to put two South ends of two magnets together. I.E. make it
impossible (or just really hard) for them to touch AFTER I have
electrified one.
I don't think iron has the right properties. It is ferromagnetic,
so the induced field is always going to be attractive.
What you want, I think, is a diamagnetic material. In effect
you're trying to do magnetic levitation.
http://www.hfml.ru.nl/levitate.html
http://en.wikipedia.org/wiki/Diamagnetism
- Randy
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| User: "Jan Panteltje" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 03:58:05 PM |
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On a sunny day (7 Oct 2005 13:40:55 -0700) it happened "Randy Poe"
<poespam-trap@yahoo.com> wrote in
<1128717655.699282.270560@g14g2000cwa.googlegroups.com>:
I don't think
Indeed.
.
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| User: "Androcles Androcles@ MyPlace.org" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 06:08:12 PM |
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"Jan Panteltje" <pNaonStpealmtje@yahoo.com> wrote in message
news:1128718705.9e762a797d1d73a09a97dc102dd14a2e@teranews...
| On a sunny day (7 Oct 2005 13:40:55 -0700) it happened "Randy Poe"
| <poespam-trap@yahoo.com> wrote in
| <1128717655.699282.270560@g14g2000cwa.googlegroups.com>:
| >
| >I don't think
| Indeed.
Quite a few like that, isn't there? Parrots everywhere, repeating
text book answers written by other parrots after they've changed
the wording.
Androcles.
.
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| User: "" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 08:47:53 PM |
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Quite a few like that, isn't there? Parrots everywhere, repeating text
book answers written by other parrots after they've changed the
wording.
************
I can see it now. A huge network of parrots. Linked by the Parrot
Internet. Forming the Parrot Global Parrot Brain!!! I like it!!!
(I know how you'll answer but I'll never see it.)
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| User: "Randy Poe" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 05:10:39 PM |
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Jan Panteltje wrote:
On a sunny day (7 Oct 2005 13:40:55 -0700) it happened "Randy Poe"
<poespam-trap@yahoo.com> wrote in
<1128717655.699282.270560@g14g2000cwa.googlegroups.com>:
I don't think
Indeed.
You disagree with my answer about ferromagnetism vs.
diamagnetism? Do you also disagree with "tadchem", who
said exactly the same thing?
Ferromagnetism doesn't work that way.
If you magnetize only one piece of ferromagnetic metal
with a coil, then it will attract the other piece of metal.
Diamagnetism works the other way.
- Randy
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| User: "Jan Panteltje" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 05:53:21 PM |
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On a sunny day (7 Oct 2005 15:10:39 -0700) it happened "Randy Poe"
<poespam-trap@yahoo.com> wrote in
<1128723038.966831.258280@g47g2000cwa.googlegroups.com>:
Jan Panteltje wrote:
On a sunny day (7 Oct 2005 13:40:55 -0700) it happened "Randy Poe"
<poespam-trap@yahoo.com> wrote in
<1128717655.699282.270560@g14g2000cwa.googlegroups.com>:
I don't think
Indeed.
You disagree with my answer about ferromagnetism vs.
diamagnetism? Do you also disagree with "tadchem", who
said exactly the same thing?
Ferromagnetism doesn't work that way.
If you magnetize only one piece of ferromagnetic metal
with a coil, then it will attract the other piece of metal.
That statement is correct, but I mentioned permanent magnet versus
electromagnet, as is in every electric motor.
Also electromagnet versus electromagnet (bigger motors).
Maybe the text was mixed up in the quoting in the posting.
But diamagnetism is of a much lower strength, and has nothing to
do with 2 pieces of iron, as the OP was talking about.
Incredible strong magnetic forces are needed to lift a frog...
Whatever.
Have fun.
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| User: "Randy Poe" |
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| Title: Re: Using electricity to repel an object? |
07 Oct 2005 10:35:36 PM |
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Jan Panteltje wrote:
On a sunny day (7 Oct 2005 15:10:39 -0700) it happened "Randy Poe"
<poespam-trap@yahoo.com> wrote in
<1128723038.966831.258280@g47g2000cwa.googlegroups.com>:
Jan Panteltje wrote:
On a sunny day (7 Oct 2005 13:40:55 -0700) it happened "Randy Poe"
<poespam-trap@yahoo.com> wrote in
<1128717655.699282.270560@g14g2000cwa.googlegroups.com>:
I don't think
Indeed.
You disagree with my answer about ferromagnetism vs.
diamagnetism? Do you also disagree with "tadchem", who
said exactly the same thing?
Ferromagnetism doesn't work that way.
If you magnetize only one piece of ferromagnetic metal
with a coil, then it will attract the other piece of metal.
That statement is correct, but I mentioned permanent magnet versus
electromagnet, as is in every electric motor.
And OP said he wanted to electrify one piece of metal and
cause it to repel an unmagnetized piece of metal.
I told him, as did the other poster, that the magnetic
field induced in a ferromagnetic material by the electromagnet
is in the wrong direction, and what he needed was a diagmagnetic
material.
The links talk specifically about how to use diamagnetism to
do exactly what OP is looking for with only a single magnet.
Also electromagnet versus electromagnet (bigger motors).
Maybe the text was mixed up in the quoting in the posting.
And OP specifically said he didn't want the other piece
of metal to be a permanent magnet or an electromagnet.
But diamagnetism is of a much lower strength, and has nothing to
do with 2 pieces of iron, as the OP was talking about.
But what OP wants to do can't be done with two pieces of
iron in the way he is talking about. So he is stuck with
diamagnetism.
Incredible strong magnetic forces are needed to lift a frog...
So you think you can magnetically levitate an unmagnetized
piece of iron through ferromagnetism and weak fields? Good
luck with that.
- Randy
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| User: "Jan Panteltje" |
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| Title: Re: Using electricity to repel an object? |
08 Oct 2005 04:38:55 AM |
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On a sunny day (7 Oct 2005 20:35:36 -0700) it happened "Randy Poe"
<poespam-trap@yahoo.com> wrote in
<1128742536.130775.186600@o13g2000cwo.googlegroups.com>:
So you think you can magnetically levitate an unmagnetized
piece of iron through...
Take magnet, hold above iron, SNAP.
idiot
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