Figure 2.20. This is a graph with two lines on it and two vertical scales, one for each line. Frequency is plotted on the horizontal axis from 0 to 2000 hertz. This is a linear scale, as is often the case when resonant circuits are involved. On the left side, impedance is plotted vertically from 0 to 1000 ohms. On the right Current is plotted from 0 to 25 mA. Both vertical scales are linear. The impedance curve comes on to the graph at 420 hertz and 1000 ohms. Then it has these values in the order frequency in hertz and impedance in ohms. 480, 800. 560, 600. 680, 400. 840, 200. 1000, 50. 1200, 200. 1560, 400. 1760, 600. 2000, 750. The line runs off the graph at this last point. The other curve is as follows. Frequency in hertz, current in milliamps. 0, 0. 200, 0.5. 400, 1. 600, 2. 800, 4.5. 1000, 20. 1200, 5. 1400, 3. 1600, 2. 1800, 1.5. 2000, 1.3. End verbal description.
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