Magnetomotive force and the H-field

  • #1
167
0

Homework Statement



The magnetomotive force is given as an integral of the H-field. I want to know how this can be a force.

Homework Equations



[tex]\int H \cdot d \ell = F[/tex]

The Attempt at a Solution



So a bit confused. Wiki says that this equation

[tex]\int H \cdot d \ell = F[/tex]

is a force, the magneto-motive-force. But this is the H-field multiplied by a length [tex]\ell[/tex]. From what I knew about the H-field, if you multiply the H-field with a length, you should get a current, not a force as

[tex]\int H \cdot d\ell = I[/tex]

I know this because

[tex]H = \frac{I}{2\pi r}[/tex]

you can see why by rearranging it

[tex]H \cdot r = \frac{I}{2\pi}[/tex]

so what gives?

Thanks in advance.
 

Answers and Replies

  • #2
vela
Staff Emeritus
Science Advisor
Homework Helper
Education Advisor
14,995
1,572
It's analogous to electromotive force. Neither electromotive force or magnetomotive force is a force in the traditional sense. That is, it's not measured in newtons in the SI unit system.
 

Related Threads on Magnetomotive force and the H-field

  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
1
Views
1K
Replies
1
Views
958
Replies
3
Views
2K
Replies
1
Views
6K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
2
Views
653
  • Last Post
Replies
2
Views
14K
  • Last Post
Replies
6
Views
4K
Top