6.5: Procedure

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6.5.1: Current Source

1. Using Figure 6.4.1 with Vin = 10 V p-p and R = 10 k\(\Omega\), and assuming that the reactance of the capacitor is much smaller than 10k and can be ignored, determine the circulating current using measured component values and record in Table 6.6.1.

6.5.2: Measuring Reactance

2. Build the circuit of Figure 6.4.1 using R = 10 k\(\Omega\), and C = 1 \(\mu\)F. Place one probe across the generator and another across the capacitor. Set the generator to a 200 Hz sine wave and 10 V p-p. Make sure that the Bandwidth Limit of the oscilloscope is engaged for both channels. This will reduce the signal noise and make for more accurate readings.

3. Calculate the theoretical value of Xc using the measured capacitor value and record in Table 6.6.2.

4. Record the peak-to-peak capacitor voltage and record in Table 6.6.2.

5. Using the source current from Table 6.6.1 and the measured capacitor voltage, determine the experimental reactance and record it in Table 6.6.2. Also compute and record the deviation.

6. Repeat steps three through five for the remaining frequencies of Table 6.6.2.

7. Replace the 1 \(\mu\)F capacitor with the 2.2 \(\mu\)F unit and repeat steps two through six, recording results in Table 6.6.3.

8. Using the data of Tables 6.6.2 and 6.6.3, create plots of capacitive reactance versus frequency.