Is emf generated when magnet moves linearly across own field

  • #1

Main Question or Discussion Point

Does an emf create across the body of a magnet when the magnet is linearly moving across its own field.

If ABCD is a rectangular magnet of thickness t, AB is the north pole and CD is the south pole. If the magnet moves in the direction of t, that is perpendicular to ABCD plane, will there be an emf generated between the faces AC and BD?
 

Answers and Replies

  • #2
Matterwave
Science Advisor
Gold Member
3,965
326
You can't have the magnet move with respect to itself. If you are asking for the electric field on the faces of the magnet itself, then you can simply work in the rest frame of the magnet. In that frame, there is no electric field. In a Lorentz boosted frame, e.g. if I am standing still as the magnet moved passed me, then I will see an electric field.
 
  • #3
Matterwave: But this is happening when a magnet rotates, like in the Faraday disc.
 
  • #4
Matterwave
Science Advisor
Gold Member
3,965
326
A rotating frame is different than a inertial frame. You are talking about a magnet undergoing uniform linear motion are you not?
 

Related Threads on Is emf generated when magnet moves linearly across own field

Replies
2
Views
522
Replies
7
Views
740
Replies
20
Views
7K
Replies
13
Views
4K
  • Last Post
Replies
5
Views
1K
Replies
9
Views
3K
Replies
2
Views
1K
Replies
12
Views
2K
Replies
9
Views
2K
  • Last Post
Replies
7
Views
2K
Top