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Homework Help: Position Varying Electric Potential

  1. Feb 12, 2010 #1
    http://img168.imageshack.us/img168/3786/66134795.png [Broken]

    Part one was simple enough, just insert the variables in the equation given

    V = (5)(92)(7) - (9)(9)(6) - (9)(72) = 1908 V

    Part two, three and four is where I am getting confused.

    Usually I would use triangles to figure out components but I am unable to figure out the direction of the field just based on the information given.

    I'm not sure if I am thinking about this the wrong way or if I am misunderstanding some of the information given. Any thoughts that could get me thinking in the right direction would be greatly appreciated. Thanks in advance.
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Feb 12, 2010 #2

    kuruman

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    Use

    [tex]\vec{E}=- \vec{\nabla} V[/tex]
     
  4. Feb 12, 2010 #3
    Thanks for the quick response. I got it.

    Just take the derivative with respect to the component you you're looking for and change the +/- sign.

    Thanks!
     
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