E-Field Plotting worksheet

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Arizona State University *

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122

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Physics

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Feb 20, 2024

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5

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E L E C T R I C F I E L D P L O T T I N G – W O R K S H E E T Name: Jennifer Oblea Mercado Partners: TA: Binod Lamichhche Cleaning up & Signing out (3): Data/Plots (40): Analysis (15): Post Lab Qs (30): Lab Report Total (88): ANALYSIS 1) Two-Point charges : E 1 , center = ¿ …50… (unit: _V/m___ ) E 1 , fringe = ¿ …18.18… (unit: __m___ ) 2) Parallel plates: E 2 , center = ¿ …45.45…… (unit: __m__ ) E 2 , fringe = ¿ ……47.62… (unit: __m_ ) 3) Ratio R 1 = E 1 ,fringe E 1 , center = …0.364… R 2 = E 2 ,fringe E 2 , center = …1.048… 1
2
POST LAB QUESTIONS 1) For the dipole configuration: a) Are the equipotential surfaces equally separated across a majority of the page? No, they are not, they diverge. b) Is the electric field uniform across a majority of the page? What makes it uniform/non-uniform? Yes, it is uniform because of the equal voltage. 2) For the parallel-plates configuration: a) Are the equipotential surfaces equally separated across a majority of the page? Yes, they are spread equally throughout the page. b) Is the electric field uniform across a majority of the page? What makes it uniform/non-uniform? Yes, they are uniform because they follow the parallel plates and have equal space. 3) a) Is R 2 greater than R 1 ? Yes, R 2 is greater than R 1 . b) Based on the ratios R 2 and R 1 , which geometry generates a more uniform electric field? Briefly explain your answer, and make sure to mention the distribution of charge and how it affects the equipotential surfaces. Remember to consider the direction of causality (what causes what?). The parallel plate geometry is what generates a more uniform field because they make a more consistent and equal spaced lines. 3
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Don’t forget to answer the questions on the next page! 4) Why do electric field lines not intersect? Explain briefly. A small drawing would be helpful. The electric fields do not intersect because it created two potential vectors. 5) Why do equipotential surfaces not intersect? Explain briefly. A small drawing would be helpful. The equipotential surfaces do not intersect because they have different surfaces and have different electric potential. 6) Why are electric field lines always perpendicular to equipotential surfaces? Explain your argument mathematically (just showing math without explaining your understanding of it is not sufficient). The electric field lines are always perpendicular to equipotential surfaces because if they would have a charge throughout if they crossed. 4
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