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# PhyLab9 - 9.4.4 Observing the Voltage Across the Resistor...

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9.3.2 Measuring Amplitude 1. Method 1 Vmin – Vmax = 2 divisions. (2 divisions x 2V) = 4V = Vo 2. Method 2 4.52V = Vo’ 3. Percent Difference (abs(Vo-Vo’)/Vo’) x 100% (abs(4-4.25)/4.25) x 100% = 5.88% 9.4.2 Observing the Voltage Across the Capacitor in a Series RC Circuit 1. See attached page. 2. Vc increases exponentially to a know maximum then decreases exponentially approaching zero. 9.4.3 Measuring the Time Constant of the RC Circuit 1. τ = 94.9 μ s 2. τ (expected) = RC = (10170 )(0.0000001F) = 101.7 μ s 3. (abs( τ - τ (expected))/ τ (expected)) (abs(94.9 – 101.7)/ 101.7) = 6.69%

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Unformatted text preview: 9.4.4 Observing the Voltage Across the Resistor in a Series RC Circuit 1. See attached graph. 2. V(t) = E(1-e-t/RC ) 9.4.5 The Effect of Frequency on Vc 1. As the frequency was increased the value of Vc decreased. 2. It seems that increasing the frequency makes the circuit seem like an open circuit. 9.4.7 The Effect of Changing C on Vc 1. 1. τ = 2.03ms 2. Lowering the frequency of the function generator seems to lower the voltage of the circuit. 3. τ = RC = [(10,000 Ω )(0.1+0.1)]x1000 = 2.0ms 4. (abs(2.03 – 2.0)/ 2.0) = 15%...
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