Infinite Sheet Potential Question

  1. 1. The problem statement, all variables and given/known data

    Please check picture below or attachment.

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

    [​IMG]

    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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  2. jcsd
  3. ehild

    ehild 11,907
    Homework Helper
    Gold Member
    2014 Award

    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
     
  4. Yeah,I did find E=density/2 constant as my eletric field, but how do I get potential?
    Thanks!
     
  5. ehild

    ehild 11,907
    Homework Helper
    Gold Member
    2014 Award

    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
     
  6. You mean #2?
    Thanks!
     
  7. Thank you!
     
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