1. The problem statement, all variables and given/known data A 50 uF(microfarad) capacitor that had been charged to 30 V is discharged through a resistor. Figure 31.73 (attachment) shows the capacitor voltage as a function of time. What is the value of the resistance? 2. Relevant equations Q = Qo e^(-t/RC), o = initial Qo = CV, o = initial I = Io e^(-t/RC), o = initial 3. The attempt at a solution Original V = 30, the final V at 3ms is approximately 7V. Thus the final charge is 0.233 (7/30) of the initial charge. Q = Qo e^(-t/RC) ln (7/30) = -3/(R)(50 uF) R = 0.041 ohms The right answer is 36.4 ohms. Any suggestions?