Electric field outside a conductor and its surface charge

  • #1
665
26

Main Question or Discussion Point

Imagine a surface charge ##\sigma##. The boundary condition on ##E## is

##E_{above}-E_{below}=\frac{\sigma}{\epsilon_0}\hat{n}##, where ##\hat{n}## points outwards perpendicularly to the surface.

Because the field inside a conductor is zero, it requires that the field immediately outside is ##E=\frac{\sigma}{\epsilon_0}\hat{n}##.

But if the conductor is a large, flat plane with a uniform surface charge ##\sigma##, shouldn't the field be ##E=\frac{\sigma}{2\epsilon_0}\hat{n}##?
 

Answers and Replies

Related Threads on Electric field outside a conductor and its surface charge

Replies
9
Views
2K
Replies
2
Views
1K
Replies
2
Views
2K
Replies
3
Views
2K
Replies
3
Views
2K
  • Last Post
Replies
5
Views
711
  • Last Post
Replies
3
Views
5K
Replies
1
Views
2K
Replies
14
Views
8K
Replies
18
Views
1K
Top