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Homework Help: Potential & charge

  1. Feb 16, 2010 #1
    1. The problem statement, all variables and given/known data

    To what potential should you charge a 1.0 micro(u)F capacitor to store 1.0 J of energy?

    2. Relevant equations
    Uc = 1/2C (Vc)squared

    3. The attempt at a solution

    1/2 CV^2 so V=SQR(2E/C)=SQR(2/1E^-6)=.004 V

    This isn't right though. Any help??
  2. jcsd
  3. Feb 16, 2010 #2


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    Science Advisor
    Gold Member

    It seems you have taken the wrong square root...sqrt(2/1E-6) is definitely NOT .004.

    2/1E-6 = 2E6 so the sqrt(2E6) is...?
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