EC3 - Tau = -1/slope = -1/-0.0104 = 96.15s (RC measured) 4....

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John Salek-Raham Ian Swanson Physics 152 3/19/08 Lab EC3: RC Circuits VI : 2. In This experiment, the discharging of a capacitor was observed through a resistor. Voltage was measured over time intervals. See attached data sheet for tabulated Data. ln(V) was then plotted vs. Time ln V vs.Time y = -0.0054x + 0.3773 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0 50 100 150 200 250 300 Time (s) ln(V) Using the graph and the relationship that Slope = -1/Tau: Time constant (Tau) = -1/S = -1/(-0.0054) = 185.2 s (RCmeasured)
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In Step 2 of the experiment, the discharging of a different capacitor was again observed. Voltage was measured over time intervals. See attached data sheet for tabulated data. ln(V) was then plotted vs. Time: ln(V) vs. Time y = -0.0104x + 0.3839 -1.4 -1.2 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0 20 40 60 80 100 120 140 160 180 Time (s) ln(V) Using the graph and the relationship Slope = -1/tau
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Unformatted text preview: Tau = -1/slope = -1/-0.0104 = 96.15s (RC measured) 4. In This part of the experiment, we observed charging of a capacitor through a resistor R. V was then measured at time intervals. See attached data sheet for tabulated data. ln(V) was then plotted vs. Time ln(V) vs Time y = -0.0103x - 0.8099-3-2.5-2-1.5-1-0.5 20 40 60 80 100 120 140 160 180 Time (s) ln(V) Using the graph and the relationship Slope = -1/tau, Tau = -1/slope = -1/(-0.0103) = 97.08 s (RC measured) 5. V-1 RC calculated : R=2e8 ohms, C = 1e6 f RC = 2e14 s V-1 sigma RC : V-2 RC discharging: R = 2e8 ohms, C = 0.5e-6 f RC = 100s V-2 Sigma RC : V-3 RC charging : R = 1.8e8 ohms, C = 1e-6 f RC = 180 s V-3 sigma RC : VII Questions : 2....
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EC3 - Tau = -1/slope = -1/-0.0104 = 96.15s (RC measured) 4....

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