PASCO
 
MAIN PROCEDURE
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    In this experiment, students will develop a relationship between voltage and current.
    1. What are the units of voltage and current?
    1. Move the switch to the "DISCHARGE" position. Maintain this position for approximately 15 seconds.

    2. Flip the switch to the "CHARGE" position.

    3. Press the Start button in DataStudio.

    4. Collect data for approximately 30 seconds.

    5. Press the Stop button in DataStudio.

    6. Move the switch to the "OPEN" position.

    7. Detach the patch cords above the 10 Ohm resistor and attach them to the 33 Ohm resistor. Repeat steps 1-6.

    8. Detach the patch cords above the 33 Ohm resistor and attach them to a bulb. Repeat steps 1-6.

    9. You should have a total of three data runs.
    1. Using the Fit Button ( ), find the appropriate fit from the data for each resistor.

    2. Determine the slope of your graph for each data run.
    DataStudio
    1. What is the physical meaning of the slope for the Voltage v. Current graphs?

    2. What is the physical meaning of the vertical intercept for the Voltage v. Current graphs?

    3. Starting with y=mx+b, write an equation that represents the relationship between Voltage v. Current for the resistors. Don't forget to include units on all numbers!

    4. Why is the voltage-current relationship different for a light bulb vs. a resistor?

    5. Draw a schematic of the circuit. Describe the role of the capacitor. Specifically, address the current through the circuit while the capacitor is charging.