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Infinite Sheet Potential Question

by CH1991
Tags: infinite, potential, sheet
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CH1991
#1
Dec14-11, 12:38 AM
P: 27
1. The problem statement, all variables and given/known data

Please check picture below or attachment.

http://i.imgur.com/DayoP.png



2. Relevant equations

E=density/2 constant

3. The attempt at a solution

I know, E=density/2 constant, but how do we get potential from eletric field and how do I find it is positive or negative?

Thanks!
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ehild
#2
Dec14-11, 12:48 AM
HW Helper
Thanks
P: 10,768
Recall that the electric field strength is negative gradient of the potential which is equivalent to say the potential difference VA-VB between points A and B is[tex]V_B-V_A=-\int_A^B{E_s ds}[/tex]
Find the electric field between the plates first.

ehild
CH1991
#3
Dec14-11, 12:54 AM
P: 27
Yeah,I did find E=density/2 constant as my eletric field, but how do I get potential?
Thanks!

ehild
#4
Dec14-11, 01:01 AM
HW Helper
Thanks
P: 10,768
Infinite Sheet Potential Question

Quote Quote by CH1991 View Post
Yeah,I did find E=density/2 constant as my eletric field, but how do I get potential?
Thanks!
That is the electric field from the charge distribution of one plate, but you have two plates.

You need the potential difference between the plates.
Have you read my previous post how to get the potential difference?

ehild
CH1991
#5
Dec14-11, 01:03 AM
P: 27
You mean #2?
Thanks!
CH1991
#6
Dec14-11, 04:29 PM
P: 27
Thank you!


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