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Homework Help: Current as a function of time

  1. Feb 14, 2007 #1


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

    Given an equation for charge passing through a point in a circuit versus time: q = 3t^3 – t^2. Which is the correct equation for current as a function of time?

    2. Relevant equations

    3. The attempt at a solution

    Would it be: q', which would be 9t^2 - 2t

    Thanks a lot,

  2. jcsd
  3. Feb 14, 2007 #2
    yeah thats right you take the derivitive of q(t) with respect to t
  4. Feb 14, 2007 #3


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    Much thanks!!!
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