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Electric field and electric potential

  1. Mar 26, 2014 #1
    1. The problem statement, all variables and given/known data
    hi, all, can anyone explain why the ans is C for this question?
    http://i.imgur.com/yGyu5G3.jpg

    for the second question? shoudnt the ans is D ?
    http://i.imgur.com/R4Gvjoz.jpg

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 27, 2014 #2

    rude man

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    For first question:
    E = -grad V = -∂V/∂x i
    where i is unit vector in direction of P→Q.

    So now do you think C is correct? Why or why not?

    For second question : I agree with you!
     
  4. Mar 28, 2014 #3
    For second question: I agree with you guys too!
     
  5. Mar 28, 2014 #4

    rude man

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    E, being a vector, I should have written in bold, and is hereby so corrected.
     
  6. Mar 29, 2014 #5

    Simon Bridge

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    @delsoo: how did you get on with this in the end?
     
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