Magnetic pressure and bar magnets

  • Thread starter Ferrus
  • Start date
  • #1
13
0

Main Question or Discussion Point

So it has been puzzling me that the repulsion and attraction between two bar magnetics can be considered as a consequence of magnetic field energy density - that is magnetic pressure. I realise 1/2B^2/mu_0 is the pressure and that times the area gives the force. But conceptually I don't understand it.

Firstly - where are the magnetic fields normal to either end of the bar magnet pushing them away from each other? Why does can this 'pressure' be different - or rather why does the superposition of vectors of opposite values seemingly cause negative work, against a superposition of concordant magnetic field vectors causing positive work as such? Is it simple the differences in the energy density of different distances from each other causing differing levels of pressure?

Thanks,

Sam
 

Answers and Replies

Related Threads on Magnetic pressure and bar magnets

  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
4
Views
6K
  • Last Post
Replies
1
Views
3K
Replies
1
Views
3K
Replies
6
Views
666
Replies
6
Views
4K
Replies
8
Views
3K
  • Last Post
Replies
3
Views
7K
Replies
3
Views
1K
  • Last Post
Replies
7
Views
18K
Top