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Determining Work Based on a Charge and Particle

  1. Mar 16, 2012 #1
    1. The problem statement, all variables and given/known data
    The potential at a point is -4.5E3 V. How much work, in J, is done to bring a 0.94 C charge from infinity to the point?


    2. Relevant equations
    1V = 1 J/C


    3. The attempt at a solution
    Well I know that 1 V = 1 J/C so I did -4500V*0.94C = -4230J but I wasn't sure if this was right.
     
    Last edited: Mar 16, 2012
  2. jcsd
  3. Mar 16, 2012 #2

    gneill

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    Staff: Mentor

    Check how the units multiply out in your calculation. Do you get Joules?
     
  4. Mar 16, 2012 #3
    Ah my bad, that was a typo, what I did was -4500V*0.94C. Which does come out to J but I wasn't sure if that gave the proper answer.
     
  5. Mar 16, 2012 #4

    gneill

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    Staff: Mentor

    Alright. In that case the result looks fine :smile:
     
  6. Mar 16, 2012 #5
    Alright, thanks, I just wasn't sure because my instructor has a tendency of giving us trick problems and that just seemed too easy.
     
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