# Infinite Sheet Potential Question

by CH1991
Tags: infinite, potential, sheet
 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! Attached Thumbnails
 HW Helper Thanks P: 9,834 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$$V_B-V_A=-\int_A^B{E_s ds}$$ Find the electric field between the plates first. ehild
 P: 27 Yeah,I did find E=density/2 constant as my eletric field, but how do I get potential? Thanks!
HW Helper
Thanks
P: 9,834

## Infinite Sheet Potential Question

 Quote by CH1991 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
 P: 27 You mean #2? Thanks!
 P: 27 Thank you!

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