EE 43/100 RC Circuits 1EE 43/100 Pre-Lab: RC Circuits Name: _______________________________ TA: __________________Section: _______________ Please read the lab manual first then show your work here. V = Q/C = [ ∫ i(t)dt ] / C Differentiating this equation, we obtain i(t) = C(dV/dt) 1. If a constant current of 1.0 mA were to flow into a 200 μF (microfarad) capacitor, what would be the voltage across the capacitor after 3 seconds? 2. Describe what would happen theoretically if you were to connect an ideal current source to the following circuits. Use time plots to illustrate. a) R CEE 43/100 RC Circuits 2b) RC 3. An RC (resistor + capacitor) circuit will have an exponential voltage response of the form v(t) = A + B e-t/RC where A and B are constants that express the final voltage and the difference between the initial voltage and the final voltage, respectively. a. Given R = 10 kΩ and C = 0.1 μF, a starting voltage of 5 Volts and an ending voltage of 0 Volts, what will the voltage be at t = 1 ms? b. At what time will the voltage be 0.5 Volts? 4. Suppose you were given two black boxes, which have either a series or parallel combination of R and C. In the case of the series RC, you would not be able to touch a probe between the R and the C in the black box, so how would you go about determining R and C using the signal generator, the oscilloscope and an external resistance? (Hint: read the
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