Infinite Sheet Potential Question

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Homework Help Overview

The discussion revolves around calculating the electric potential from an electric field generated by an infinite sheet of charge. Participants are examining the relationship between electric fields and potentials in the context of electrostatics.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to understand how to derive electric potential from the electric field and questions the sign of the potential. Some participants suggest finding the electric field between the plates first and clarify that the potential difference must be considered for two plates.

Discussion Status

The discussion is ongoing, with participants providing guidance on the relationship between electric fields and potential differences. There is an emphasis on understanding the setup involving two plates and how to approach the calculation of potential.

Contextual Notes

Participants are working with the assumption that the electric field has been correctly identified as E=density/2 constant, but there is uncertainty regarding the calculation of potential and the implications of having two plates.

CH1991
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Homework Statement



Please check picture below or attachment.

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

DayoP.png


Homework Equations



E=density/2 constant

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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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 isV_B-V_A=-\int_A^B{E_s ds}
Find the electric field between the plates first.

ehild
 
Yeah,I did find E=density/2 constant as my eletric field, but how do I get potential?
Thanks!
 
CH1991 said:
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
 
You mean #2?
Thanks!
 
Thank you!
 

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