1. Lab 7 Hints

2. Activity 1C, 1B

3. Activity 1A Battery or power supply (in previous picture)

4. Activity 2 Oscilloscope lets you see the voltage across capacitor as a function of time Function generator mimics a battery that switches sign Capacitor Resistor

5. Circuit Wires from function generator Capacitor Resistor

6. Connect oscilloscope Capacitor Oscilloscope leads

7. Set up the function generator to mimic a battery that switches polarity “Square wave” mimics a battery that switches back and forth

8. Adjusting the oscilloscope 1) Set to “Auto” 2) Set to “Gnd” 3) Adjust until line is in middle of screen. This is the zero voltage line. 4) Set to “DC”

9. You should see this Adjust voltage scale (vertical) here. Adjust time scale (horizontal) here

10. Adjust the vertical scale (pull center) and trigger level until you get this….

11. Measure the time constant Time that it takes rising curve to reach 5/8 of the maximum Time constant

12. Measure the time constant Time that it takes falling curve to reach 3/8 of the maximum Time constant