Charges and Fields Lab

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Porterville College *

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104B

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Physics

Date

Jan 9, 2024

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docx

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6

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Name __________________________________ Prof. Satko PHYS 104B Lab Electric Charges and Fields Today, you will use the Charges and Fields PhET lab to map the electric field around one or more point charges. Here is a link directly to the simulation: Charges and Fields . Alternately, on the CU-Boulder Interactive Simulations (PhET) website, go to the menu on the left side of the screen. Click on Physics , then Electricity, Magnets & Circuits , then Charges and Fields .
Beginning Observations 1) First, take a few minutes to locate and identify the various features on the program. 2) Check the box that says Show numbers . 3) Add a few charges to the field, then add some E-field sensors. What do the “E-field sensors” show? Depending on where the E-field sensor is, it shows the direction of the electric field at that spot. It also shows the voltage per meter and what degree it is at. 4) Select, show E-field. How does the color of the arrow relate to the strength of the field? 5) How can you make a charge of +2 nC? -3 nC? You need to put two +1nC charges on top of each other. You do the same thing with the -1nC charges. Take out 3 of them and place them on top of each other.
Part 1 – Field around isolated point charges 6) Draw the field lines for the scenarios below. Make sure you are sketching continuous field lines. 4 nC -2 nC Part 2 – Field around two point charges in a line 7) Draw the field lines for the scenarios below. Make sure you are sketching continuous field lines. Two unequal, unlike point charges Two equal point charges Place a test e-field sensor anywhere on the screen for both scenarios and draw what you see. 8) When you have two like charges in a line – where is the electric field the greatest? Is there ever a point where the field will be zero? 9) When you have two unlike charges in a line – where is the electric field the greatest? Is there ever a point where the field will be zero?
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