• Support PF! Buy your school textbooks, materials and every day products Here!

When does the surface charge density equal the electric flux density?

  • Thread starter FOIWATER
  • Start date
  • #1
FOIWATER
Gold Member
434
12

Homework Statement


The electric field intensity in polystyrene (relative permittivity 2.55) filling the space between the plates of a parallel plate capacitor is 10kV/m. The distance between the plates is 1.5mm.
Calculate the surface charge density of free charge on the plates,
and the surface density of polarization charge

Homework Equations


rho s = D dot an


The Attempt at a Solution


---
I am having a hard time seeing how the surface charge density equals the d field normal to the surface in this case?
 

Answers and Replies

  • #2
FOIWATER
Gold Member
434
12
Is it because it's at a conducting surface
 

Related Threads on When does the surface charge density equal the electric flux density?

Replies
7
Views
10K
Replies
5
Views
6K
  • Last Post
Replies
1
Views
790
  • Last Post
Replies
0
Views
3K
Replies
0
Views
273
Replies
2
Views
2K
Replies
0
Views
4K
  • Last Post
Replies
1
Views
757
  • Last Post
Replies
4
Views
1K
Top