Is there any material when covered over a magnet will not pass the magnetic forces through it to .?
2006-09-12 06:48:00 · 5 answers · asked by raj 1 in Science & Mathematics ➔ Physics
The more ferromagnetic a material, the more it draws a magnetic field inside. Magnetic shielding is never 100%. Best materials are probably ferrite, iron or NdFe. The same stuff that makes the best magnets, also makes the best sheild.
2006-09-12 06:55:42 · answer #1 · answered by Anonymous · 0⤊ 0⤋
For magnetic shielding applications, mu metal (nickel-iron-copper-molybdenum alloy, specially annealed in hydrogen) will greatly reduce magnetic field strength. I don't know of any way to block 100% of the magnetic forces applied to a system, although under certain circumstances, it is possible to adjust another field in order to reduce or cancel out a field. Certain applications involved in nuclear magnetic resonance (NMR) require this sort of thing.
See also the Wikipedia entry, below, on mu metal.
2006-09-12 14:04:20 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Not under ordinary conditions. There are some nickel-iron alloys that are pretty good at this (the technical term is high permeability) but none are perfect. Exception: a superconductor; superconductors completely exclude magnetic fields. Think about it, and you'll see why.
2006-09-12 13:56:02 · answer #3 · answered by Anonymous · 2⤊ 0⤋
Look up Faraday cage
2006-09-12 14:33:57 · answer #4 · answered by Demiurge42 7 · 0⤊ 0⤋
No, but plastic/rubber/paper or other non metals will work equally well. However, if the thickness and density are thick enough, you can achieve the 100% effect.
2006-09-12 13:55:06 · answer #5 · answered by Wilson Wilson 3 · 0⤊ 2⤋