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Need help with circuit problem

  1. Sep 20, 2005 #1
    the problem is a series combination of 12k resistor and an unknown capacitor is connected to a 13 volt battery. One second after the circuit is completed, the voltage across the capacitor is 8v. Determine the capacitance of the capacitor. :uhh:
  2. jcsd
  3. Sep 21, 2005 #2


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    Homework Helper

    This is the problem related of charging a capacitor.
    The equation for the charge on the capacitor as a function of time is

    [tex] \q = CV \left( 1 - e^\ -t/CR \right) [/tex]
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