Page Offset and Limits Generator is set to output a 4-volt 'positive On Off only' square wave at 0.100 Hz. The Signal Auto Generator is set to 'Auto' so it will start and stop automatically when you start and stop measuring data. Data recording is set to stop automatically after 20 seconds. Set up the circuit shown in the illustration. Place a 1000-ohm resistor (brown, black, red) in the pair of spring clips nearest to the top banana jack at the lower right corner of the AC/DC Electronics Laboratory board 5. Place a 330 microfarad (UF) capacitor in the pair of spring clips nearest the bottom banana jack on the board. Connect a wire lead between spring clips at the left end of the resistor and capacitor. erfre EM-8658 AC.D CTRONICS LABO 6. Put alligator clips on the Voltage Sensor leads and connect the alligator clips at each end of the capacitor. 7. Plug the banana plug patch cords from the 'OUTPUT' port of the PASCO 850 Interface into the banana jacks on the board. Procedure 1 . In Capstone, click 'Record' to begin recording data. 26 - 2 of 4 2004 PASCO012-09289 Physics Experiment Manual 26 RC Circuit Watch the Graph display of voltage versus time. 2. Data recording will continue for 20 seconds and then stop automatically. Run #1 should appear in the Data list. Analysis 4.0- Voltage. ChA Run #1 1 . Click the 'Scale to fit' button to 3.5 rescale the graph if needed. 3.0 2 . Expand a region of the Graph display. Use 2.5 the 'Highlighter' -tool in Capstone to 2.0 Voltage, ChA (V) click-and-draw a rectangle over a region of 1.5 the plot of Voltage versus Time that shows 1.0 the voltage rising from zero volts to the 0 .5 maximum volts. Use the scale () tool to 0.0 expand highlighted region. 10 15 20 3. Use the built-in analysis tools in the Graph Time (s) display to find the time to 'half-max'. 4.0- Click the 'Coordinate Tool' (), add Voltage. Cha 3.5 - Run #1 Multi-Coordinates Tool. Move the 'Coordinate Tool' to the point on the plot 3.0 where the voltage begins to rise. Record the 2.5 x-coordinate. Drag the 'Coordinate Tool' to 2.0 the point where the voltage is about 2 volts. 1.5 Record the x-coordinate. The time to 'half- 1.0 max' is the difference in 'x-coordinates' 4. Record the time to 'half-max' in the Lab 0.0 Report section. Use ty = In2 = 0.693 x 12 16 Time (s) RC to calculate the capacitance (C) of the capacitor