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General Questions about Eletric Field and Eletric Potential

  1. Sep 15, 2011 #1
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution

    Hi! I have already write everything on the pictures(In attachment), I have already circled the correct answer, however, I am not sure explain it correctly. So, can you check my explanation or question?
    Thanks!

    7QZOQ.png
     

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  2. jcsd
  3. Sep 15, 2011 #2

    Hootenanny

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    Question Two: The electric field is uniform (constant). Why do you think it isn't? See http://www.studyphysics.ca/30/fields.pdf" [Broken] to check your understanding of electric field lines.

    Question Five: Yes. Since you are interested in the outward flux and the enclosed charge is positive, the flux through the surface is indeed, positive.

    Question Six: You have the right idea, but I wouldn't use the word enclosed since the Gaussian surface doesn't enclose the negative charge. There is an additional [negative] contribution of flux through the left end cap due to the presence of the negative charge.

    Question Seven: Are you sure that the electric potential is lower at A than B?

    Question Eight: Again, are you sure that the electric potential is lower at A than B?
     
    Last edited by a moderator: May 5, 2017
  4. Dec 14, 2011 #3
    Thank you!
     
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