Can a cylinder block magnetic fields in one direction like a Faraday cage?

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SUMMARY

A cylinder with one open side cannot function as a Faraday cage for magnetic fields, as Faraday cages primarily shield against electric fields. To effectively shield against magnetic fields, materials such as ferrous metal or mu-metal must be utilized. While a ferrous metal cylinder can attenuate some external magnetic fields, the open end will still allow some magnetic field lines to curve in and out. Therefore, complete shielding is not achievable with this configuration.

PREREQUISITES
  • Understanding of Faraday cages and their function in electromagnetic shielding
  • Knowledge of magnetic fields and their properties
  • Familiarity with materials used for magnetic shielding, specifically ferrous metal and mu-metal
  • Basic principles of electromagnetic theory
NEXT STEPS
  • Research the properties and applications of mu-metal for magnetic shielding
  • Learn about the limitations of Faraday cages in relation to magnetic fields
  • Explore the design considerations for effective magnetic shielding in open-ended structures
  • Investigate alternative methods for shielding against magnetic fields in engineering applications
USEFUL FOR

Electrical engineers, physicists, and anyone involved in designing electromagnetic shielding solutions will benefit from this discussion.

athul jyothis
Can a cylinder with 1 side open act as a faredey cage (which do not allow passage of magnetic field) when magnetic field are only coming parallel to the curved part
 

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athul jyothis said:
Can a cylinder with 1 side open act as a faredey cage (which do not allow passage of magnetic field) when magnetic field are only coming parallel to the curved part

A Faraday cage is used for shielding electric fields, not magnetic fields. You would use ferrous metal and/or mu-metal for shielding against B-fields.

And if your shield shown in the upside-down picture were made of ferrous metal, it would be able to shield some of the external B-field. You will still get some field curving in and out of the open end, however.
 
Thank you very much for the reply...
 

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