Ferromagnetic energy question

  • #1

Main Question or Discussion Point

Consider a brick-shaped ferromagnetic of relative magnetic permeability µ >> 1, which has dimensions 2a × 2a × a and a narrow slit of width d and depth a sawed into it as shown in Figure. You may assume that µd >> a >> d. A circular loop of diameter a and inductance L, made of a superconducting material, is put into that slit; the loop carries electric current I. What is the mechanical work A needed to be done in order to pull the loop out of the slit and move it to a large distance from the ferromagnetic?

Remarks: (a) the inductance of the loop equals to L when it is far away from the ferromagnetic. (b) The current in the loop equals to I when the loop is inside the slit.
 

Attachments

Answers and Replies

Related Threads on Ferromagnetic energy question

  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
1
Views
2K
Replies
1
Views
3K
  • Last Post
Replies
1
Views
11K
Replies
1
Views
2K
  • Last Post
Replies
3
Views
4K
Replies
1
Views
2K
Replies
6
Views
5K
Replies
1
Views
860
Replies
3
Views
1K
Top