Magnetic force on ferromagnetic body

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Discussion Overview

The discussion revolves around the magnetic force exerted on ferromagnetic materials, specifically focusing on the case of a soft iron cube placed in a magnetic field. Participants explore the complexities involved in calculating this force, considering various factors such as material properties and field uniformity.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions the force exerted on ferromagnetic materials in a magnetic field, particularly for a soft iron cube.
  • Another participant notes that the force is influenced by multiple factors, including the magnetic properties of the material, its dimensions, orientation, and the spatial variation of the magnetic field.
  • It is mentioned that a uniform magnetic field typically results in no net force on the object.
  • A later reply suggests that the material is magnetostrictive and is subjected to a uniform magnetic field in the x direction.
  • One participant expresses skepticism about the existence of a net force in a uniform magnetic field.

Areas of Agreement / Disagreement

Participants express differing views on whether a net force exists in a uniform magnetic field, indicating a lack of consensus on this aspect of the discussion.

Contextual Notes

The discussion highlights the complexity of calculating magnetic forces on ferromagnetic materials, with considerations of shape and uniformity of the magnetic field remaining unresolved.

sorena_2006_1
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Hello
when we study electromagnetic ,it is easy to find force of a magnetic field on particle witch has electric charge (for example electron and ...) but what is force of magnetic field on ferromagnetic materials? for example if we put a cube of soft iron with a*a*a dimentions near a magnetic field B or H what is the force witch attract it?
 
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The force depends on many things, so there is no simple formula.
The force depends on the magnetic properties of the object, its dimensions and orientation, and the spatial dependence of the B field.
There will generally be no force for a uniform B field.
A cube is a difficult shape calculate the force on.
 
Thank you dear Meir Achuz
material is magnetostrictive and objected to a uniform (respect to x direction) magnetic field.
 
I don't think there will be any net force in a uniform magnetic field.
 

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