The Naked Scientists

The Naked Scientists Forum

Author Topic: What material(s) can shield an object from a magnetic feld?  (Read 1258 times)

Peter

  • Guest
Peter asked the Naked Scientists:
   
What material(s) can shield an object from a magnetic feld?

What do you think?
« Last Edit: 06/02/2011 17:30:04 by _system »


 

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • Posts: 12001
  • Thanked: 4 times
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
What material(s) can shield an object from a magnetic feld?
« Reply #1 on: 06/02/2011 18:01:20 »
No, you can't 'shield' but you can retrace it around/from a object by offering it a 'easier path'. The reason you can't shield it is that there are no magnetic 'charges' as there is with electricity (positive and negative charges). Magnetic field lines will pass through all materials I know off. But you can reroute it.

Look at what "conduct" magnetic flux best, then use that.
« Last Edit: 06/02/2011 18:09:22 by yor_on »
 

Offline Bored chemist

  • Neilep Level Member
  • ******
  • Posts: 8670
  • Thanked: 42 times
    • View Profile
What material(s) can shield an object from a magnetic feld?
« Reply #2 on: 06/02/2011 18:27:47 »
Passive shielding as described above works very well. It works even better if you use a superconductor as a shield.
There is another trick called active shielding where you measure the field and set up an opposing field with an electromagnet.
 

Offline graham.d

  • Neilep Level Member
  • ******
  • Posts: 2208
    • View Profile
What material(s) can shield an object from a magnetic feld?
« Reply #3 on: 06/02/2011 18:52:16 »
A material that is used to shield magnetic flux is called mu-metal. It does not work 100% though.
 

The Naked Scientists Forum

What material(s) can shield an object from a magnetic feld?
« Reply #3 on: 06/02/2011 18:52:16 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums