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Math Help - determine the current flowing thru an element

  1. #1
    Super Member bigwave's Avatar
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    Cool determine the current flowing thru an element

    determine the current flowing thru an element is the charge flow is given by:

    (a) q(t) = (3t+8) mC

    assume the way to do this is just

     <br />
i= \frac{dq}{qt}=\frac{d}{dt} (3t+8)mC= \boxed{3mC}<br />

    assume we keep the same units for answer.
    there are 4 more of these
    just seeing if doing what should be.
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  2. #2
    A Plied Mathematician
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    Looks good to me, except the units are incorrect. You should have some version of amps going on there for the current.
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  3. #3
    Super Member bigwave's Avatar
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    Cool (b)

    oops... yes it should 3m[A]

    (b)
    q(t)  = (8t^2+4t-2)[C]

    so thus for i

    i=\frac{dq}{qt}=\frac{d}{dt} (8t^2+4t-2)C=(16t+4)[A]
    Last edited by bigwave; January 6th 2011 at 12:35 PM. Reason: latex error
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  4. #4
    A Plied Mathematician
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    Sure.
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