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Find the value of a capacitor given percent of the initial value

  1. Apr 23, 2013 #1
    1. The problem statement, all variables and given/known data

    A capacitor is discharged through an 80.0 ohm resistor. The discharge current decreases to 23.0% of its initial value in 1.50ms .

    What is the value of the capacitor?

    2. Relevant equations


    3. The attempt at a solution

    1500 μs = 0.23 RC
    RC= 6521.74

    C= 6521.74/R

    C= 6521.74/80 = 81.5 μF

    This is not correct... Please help! It's due within the next thirty minutes!
  2. jcsd
  3. Apr 24, 2013 #2

    Simon Bridge

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    Science Advisor
    Homework Helper

    The voltage vs time graph is not linear.
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