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• voltaje
• Serie y circuitos paralelos
• Electromagnetismo
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Lab Capacitors (H) Go to https://phet.colorado.edu/en/simulation/legacy/capacitor-lab and click the play button to download the simulation. You will need to click save and/or run now when it opens the initial java file. This simulation deals with capacitance and capacitors which we are unable to experiment with in physical labs because we do not have access to the required materials. The SI unit of capacitance is the farad (symbol: F), named after the English physicist Michael Faraday. A 1 farad capacitor, when charged with 1 coulomb of electrical charge, has a potential difference of 1 volt between its plates. Introduction Begin by familiarizing yourself with the setup. Start on the Introduction tab and check all boxes except Electric Field Detector. Move the red voltmeter wire to the top plate and the black wire to the bottom plate. Increase the battery voltage between 0 and 1.5V. Record observations for changes in each of the following as you increase the voltage. a. Capacitance b. Plate charge c. Stored Energy d. Voltage across plates (Read off of voltmeter) e. How does the voltage across the plate compare to the battery voltage? Now, change the battery voltage to somewhere between 0 and -1.5 V. Record observations for changes in each of the following. a. Capacitance b. Plate charge c. Stored Energy d. Voltage across plates (Read off of voltmeter) e. How does the voltage across the plate compare to the battery voltage? Multiple capacitors Change from the introduction tab to the multiple capacitors tab. Make sure that only the total capacitance and stored charged boxes are checked. That’s the only tool you will need for this section.

For simplicity, all numbers to be input will be given without the x10-13 and can be recorded without the x10-13. C1 = 2, C2 = 3, and C3 = 1, these should remain constant. Keep the voltage supplied by the battery at 1.5 V. Notice that even if the voltage is set to zero, there is still a total capacitance, this is because capacitance is based off of the initial set up and material you are working with. Starting with a single resistor, record the total capacitance and stored charge. These will act as a baseline for comparison. Once you have those initial numbers for comparison, you need to fill out the chart displaying the following information. Using the values given above, you need to find the total capacitance and the stored charge for each of the available scenarios: 2 in series, 3 in series, 2 in parallel, 3 in parallel, 2 in series + 1 in parallel, 2 in parallel + 1 in series.

Use the information from the above chart and what we have talked about in class to write a full comparison and conclusion. This should be a lengthy conclusion as there are multiple situations to compare and draw conclusions from. To be included in the conclusion is a description of how the total charge was distributed across the different plates. Does the total capacitance make sense? Why is it smaller when they are in series and much larger when in parallel? Also, look at the last two set ups which are complex circuits and discuss how the charge is distributed in each portion of the circuit.