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Author Topic: A question about per.magnets and lead  (Read 6214 times)

giolvasrulez

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A question about per.magnets and lead
« on: March 10, 2009, 02:59:25 PM »
Does anybody know what will happen if you place a relatively thick lead plate on the poles of a permament magnet?

Low-Q

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Re: A question about per.magnets and lead
« Reply #1 on: March 10, 2009, 03:50:28 PM »
Does anybody know what will happen if you place a relatively thick lead plate on the poles of a permament magnet?
Nothing whatsoever. Lead can shield radioactive radiation, but magnetic fields goes through everything. You can however guide magnetism in alternative paths without altering the total magnetic field in streingth, by using magnetic materials such as iron and other magnets. Some materials repels from magnetism also. Bismuth and carbonfiber are a few of such materials.

br

Vidar

giolvasrulez

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Re: A question about per.magnets and lead
« Reply #2 on: March 10, 2009, 04:12:39 PM »
I am asking because I have read a theory that closely relates cosmic radiation to magnetism. And it also states that if you block a magnet with lead the magnet looses its strength (not entirely but in a large percent), because lead blocks cosmic radiation.
Is there a chance that anything like that is true?

giolvasrulez

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Re: A question about per.magnets and lead
« Reply #3 on: March 10, 2009, 07:06:48 PM »
Let me put it this way:

Does the newly found physical property of permeability has anything to do with cosmic rays (hard component) shielding?

0c

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Re: A question about per.magnets and lead
« Reply #4 on: March 10, 2009, 07:21:10 PM »
1) Lead is slightly diamagnetic, so will tend to repel a magnet just a tiny bit.

2) Permeability is not something new unless you think hundreds of years old is new. As far as I know, gamma rays are not dipolar like magnets, more like super high-frequency light waves traveling in a straight line.

giolvasrulez

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Re: A question about per.magnets and lead
« Reply #5 on: March 10, 2009, 07:54:41 PM »
You are right about the lead. It was a text error. Lead has no permeability. Iron has good permeability and a 0.5cm thick iron blocked my neodymium magnetic field setup very well.
But high permeability alloy materials like mu-metal blocks entirely the magnet and also blocks hard component cosmic rays.
So I guess there has to be some major connection between cosmic rays and magnetism.

SomedayIsle

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Re: A question about per.magnets and lead
« Reply #6 on: March 10, 2009, 08:14:17 PM »

Hence, the magnetosphere.  Our shield drops....


We drop.



jadaro2600

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Re: A question about per.magnets and lead
« Reply #7 on: March 10, 2009, 09:54:14 PM »
So what are cosmic rays exactly?

giolvasrulez

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Re: A question about per.magnets and lead
« Reply #8 on: March 10, 2009, 10:58:45 PM »
cosmic rays are just entering our earth's north pole (entry crown) and exiting earth's south pole (exit crown)..In the other areas around the earth they can't enter because they are blocked by a neutron "solidcloak". Ofcourse earth is a magnet.

giolvasrulez

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Re: A question about per.magnets and lead
« Reply #9 on: March 10, 2009, 11:35:24 PM »
Just try this.
Try put 2 iron plates (about 5 x 5 cm, 0.4 cm thick) in the center of the poles of a neodymium nickel coated small cylidrical magnet (1 cm diameter, 1 cm height).
It will totaly destroy the magnetic field in every direction.

I guess if it was possible to do the same to earth, by using magnetic shielding materials in the cosmic radiation entry and exit crowns (north & south pole) then kiss the earth's magnetic field goodbuy. ;D

AbbaRue

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Re: A question about per.magnets and lead
« Reply #10 on: March 11, 2009, 12:33:24 AM »
@giolvasrulez
I will have to try that. (The 2 metal plates on a Neo. Mag.)
This could be the start of a new source of energy.
IF it doesn't take much to move the metal plates back and forth on the magnet.

0c

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Re: A question about per.magnets and lead
« Reply #11 on: March 11, 2009, 01:14:56 AM »
If you will take the time to check the gap between the 2 steel plates, I think you will find every single line of flux is present and accounted for. It just took a convenient detour.

giolvasrulez

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Re: A question about per.magnets and lead
« Reply #12 on: March 11, 2009, 03:44:24 AM »
detour yes, but also with a drastically degenaration of the flux lines and thus of the general power of the magnetic field.
And if you try to use a material other than iron with a higher permeability then at some point the magnetic field is completely eliminated.
try use MetGlas on the neo combined with iron fragments for flux lines monitoring and you should see...

jadaro2600

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Re: A question about per.magnets and lead
« Reply #13 on: March 11, 2009, 04:57:25 AM »
cosmic rays are just entering our earth's north pole (entry crown) and exiting earth's south pole (exit crown)..In the other areas around the earth they can't enter because they are blocked by a neutron "solidcloak". Ofcourse earth is a magnet.

It would make more sense if there were negative and positive cosmic rays to enter the north or south poles than it would for them to enter one pole and exit the other.  This would mean they behave like actual particles and not just physical flukes, but this is a thread on monopoles.

jadaro2600

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Re: A question about per.magnets and lead
« Reply #14 on: March 11, 2009, 05:08:14 AM »
@giolvasrulez
I will have to try that. (The 2 metal plates on a Neo. Mag.)
This could be the start of a new source of energy.
IF it doesn't take much to move the metal plates back and forth on the magnet.


When moving any conductor to or away from a magnet, there will be eddy current generated in that metal which oppose the field nearing the magnet. 

If you drop a large permanent magnet onto a large bar of aluminum ( paramagnetic ) is will slow down as it fall and not hit the surface as hard as it would if it were, say, dropped on a wooden board, or a ferromagnetic bar. - where eddy current don't as easily change the domains of magnetism already present in the metal.

Any metal having a current moving through it will eventually generate heat, and the mag field will be destroyed or weakened.
It would be interesting to see a large magnet dropped onto a sheet of lead.  Lead is diamagnetic - so is water.