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Homework Help: Electric force and charge

  1. Mar 10, 2008 #1
    [SOLVED] Electric force and charge

    1. The problem statement, all variables and given/known data

    A positive charge of 2.90 μC is at rest at the origin. An electric force of 65.5 x 10-6 N acts on the charge as shown in the figure below. What is the x-component of the electric field at the origin?

    2. Relevant equations


    3. The attempt at a solution

    I subbed the charge and force into F=k Q/r^2 and solved for r thinking I could dos somehting with it but it is a hugeeee number so I doubt im doing it right.

    Attached Files:

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  2. jcsd
  3. Mar 11, 2008 #2
    F=Eq, use sin and cosine to find the components.
  4. Mar 11, 2008 #3


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    Homework Helper

    Wrong formulas …

    Hi n77ler!

    You have the wrong formulas!

    Not every electric charge problem asks you to find the force :frown: - in this case, they've told you what the force is, and only asked you to find the field!

    Just use SWFanatic's formula. :smile:
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