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Current through capacitor

  1. Aug 10, 2009 #1
    calculate the current through the capacitor 100mF in response of voltase 20-
     
  2. jcsd
  3. Aug 10, 2009 #2
    Your thoughts?
     
  4. Aug 10, 2009 #3
    I want to find out the i if v across capacitor is -20v

    I know the formula is i = C dv/ dt

    but here I have no t

    only capacitance and voltage
     
    Last edited: Aug 10, 2009
  5. Aug 10, 2009 #4

    diazona

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    It's not a t. It's a derivative with respect to time. dv/dt is the rate of change of voltage with respect to time. Can you find that?
     
  6. Aug 11, 2009 #5
    hi dear,

    if t is the rate of change of time then how can i drive it kindly guide
     
  7. Aug 11, 2009 #6

    Redbelly98

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    With the given information, you can only get the charge on the capacitor. Calculating i is impossible without more information.

    I suggest you look carefully at the problem statement again, is there any other information? Or a figure?
     
  8. Aug 11, 2009 #7
    hi dear,


    Kindly check that we have voltage and capacittance as

    v= -20 v

    and

    capacitace


    5 mF
     
  9. Aug 11, 2009 #8

    Redbelly98

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    Maybe this question is easier than we are making it out to be.

    If v = a constant -20V, then

    dv/dt = ____?​
     
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