Lab - Electric Potential JV E"? Objective: Develop an understanding of how the electric potential relates to the Electric Field. Part I - Examining the electric Field I Watch the \"lab introduction" video on the lab wignment page. 0 0n the upper right menu, turn the electric eld off and the grid and valua on. I Now (carefully) build a neat line charge with one right angle. Use at least 30 positive point charges to do this. Your charge distribution does not have to look exactly like the example shown below. 90tvriqoo+ovoap Figure 1: Example of a charge distribution. 0 Now turn the Eeld back on. I Embed a screen shot in your document of your charge distribution. Questions: 1) Where is the electric eld most uniform? 2) Where is the electric eld least uniform? Part II - Mapping the equipotential surfaces I Watch the "Creating an Equipotential Map" video on the lab assignment page. 0 Turn the Eeld all so the arrows disappear again. I Click on "Values" in that same menu on the right hand side of the screen. I Now you will draw equipotential curves at the following values: 300V, 250V. 200V, 150V, 100V, 50V. 0 Embed a screenshot of your charge distribution with all 6 equipotcntial curves in place (values displayed). Topographical Maps Now it's time to learn about topographic mapslln this class, we will be using this con- cept for the rest of the quarter, so it's important to really engage now. We will even apply this concept to circuits. Do not skip over this! Answer the following questions with regard to your diagram: Questions: 3) What are the contour intervals? 4) What are the areas of steepest slope? (Describe in words or embed an annotated screen- shot). 5) Where is the highest \"elevation? \" (Describe in words or embed an mutated screen- Part III - Mapping the Electric Field from Equipotential Lines . Watch the video "relationship between equipotential fields" from the lab assignment page. . Turn the grid off . Now you are going to draw E-field lines, by hand, onto your diagram . Print your diagram (in color if you can) or take a screenshot (if you have screen drawing tools). If neither of these options are available to you, neatly recreate the figure by hand. . Draw in 20-25 E-field lines by hand so they fill the page (include direction) . Embed an image of your diagram with the E-field lines in place. Here is an example of equipotential curves and field lines for a single positive point charge. This is much simpler than what you are doing, but it gives you the idea: Field lines Equipotentials Figure 3: Note how the E-field lines are perpendicular to the surface they are leaving and perpendicular to the equipotential lines. Answer the following questions with regard to your diagram: Questions 6) How does E-field line density change as slope changes? 7) Where is the field most uniform? Does your answer match with the answer you gave at the beginning of the lab? Part IV - Creating a uniform electric field . Reset the simulation (or start a new one). . How could you arrange some charges (you can use both positive and negative now) to create a region of uniform electric field? . Embed a screenshot, making sure to include the electric field arrows. Electric Field Direction only Voltage Values Grid 300.0 V 250.2 V 200.1 V 150.0 V 0.0 V O 100.0 V + +1 nC 1 nc Sensors 1 meterElectric Field Direction only Voltage Values Grid 300.0 250.2 V 200.1 V 150.0 V 0.0 V 100.0 V + +1 nC -1 nc Sensors 1 meter Charges and Fields PhET Electric Field Direction only Voltage Values 324.1V Grid 275.3-V 224.7 V 0.0 V 175.2 V 125:3 V 80.2V + +1 nC -1 nC Sensors 1 meter Charges and Fields PhET. =