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
E&M Exam Question, I want to know what I did wrong
Reply to thread
Message
[QUOTE="kuruman, post: 6336645, member: 192687"] 1. From Gauss's law using a pillbox whose one face is inside the conductor and the other inside the dielectric ##D A=\sigma A \rightarrow D=\sigma##. 2. Inside the dielectric you correctly wrote ##D=\epsilon_0 E+P## and ##E=\dfrac{D}{\epsilon}##. So, with the result from part 1, $$\sigma=\epsilon_0 \frac{\sigma}{\epsilon}+P~ \rightarrow~P=\sigma\left(1-\frac{\epsilon_0}{\epsilon}\right).$$ 3. The surface bound charge density is equal to ##P##. Of course ##\dfrac{\epsilon_0}{\epsilon}=\dfrac{1}{4}##. So what did you do wrong? You insisted on using ##Q## for the enclosed charge instead of using the given charge density ##\sigma##. Thus, you got stuck with this silly ##Q/XY## that you did not recognize as the surface charge density. [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Introductory Physics Homework Help
E&M Exam Question, I want to know what I did wrong
Back
Top