Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Homework Help
Introductory Physics Homework Help
Electric field on a surface
Reply to thread
Message
[QUOTE="Sixty3, post: 4700771, member: 229654"] [h2]Homework Statement [/h2] A metallic surface is placed in an electrostatic field. Derive an expression for the electric field on the metal surface. [h2]Homework Equations[/h2] [itex]\oint \underline{E} \cdot d\underline{A}=\dfrac{q_{enc}}{\epsilon_0}[/itex][h2]The Attempt at a Solution[/h2] My initial thought was to set up a cylindrical Gaussian surface, I've tried to show it in the picture attachment. [ATTACH=full]168418[/ATTACH] Then the dA facing downwards will be 0 since the electric field within the metal is 0, and the 'side' of the cylinder dA is perpendicular to the electric field and also 0. So the only contribution is the upward facing circular area. Letting Δh→0, it gives the electric field on the surface, EA=q/ε, and q/A=σ the surface charge density. So E=σ/ε. Is this method correct, I'm not entirely sure to be honest. [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Introductory Physics Homework Help
Electric field on a surface
Back
Top