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Coulomb's Law: Investigating Electric Force with Interactive Simulation, Lab Reports of Physics

Aurora UniversityPhysics

This lab worksheet guides students through an interactive simulation experiment to explore coulomb's law. Students will investigate how electric force varies with charge magnitude and distance, collect data, create graphs, and analyze the relationship between electric force and charge magnitude and distance. The worksheet includes instructions for using the simulation, data collection, graph creation, and analysis, as well as questions to guide students' understanding of coulomb's law.

Typology: Lab Reports

2024/2025

Uploaded on 01/28/2025

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Laboratory #2 – Coulomb’s Law
Name: ____________________________
PHY 2220Z/Section:_________________
Score:________/72 Pt
Instructions:
Completing this worksheet
• You may either complete this worksheet by annotating the PDF file with embedded text or print a hard
copy and handwrite your responses.
Submission
• If you complete this worksheet on a hard copy, scan, or take pictures of the completed lab handout,
consolidate the pages into a single PDF file, and upload it to Brightspace.
• Provide the link to the shared spreadsheet so I can review your work and give full credit.
• Plot the graphs using an Excel spreadsheet, take screenshots, and consolidate the images into a Word
document or PowerPoint presentation. Then upload it to Brightspace.
Purpose: To deepen students' understanding of Coulomb's Law by investigating how electric force varies
with charge magnitude and distance through interactive simulation, observation, and data analysis.
Objectives:
In this experiment, you will
1) Predict how electrostatic attraction/repulsion changes as a function of distance between charged
particles.
2) Predict how electrostatic attraction/repulsion changes as a function of the magnitude of charge
between charged particles.
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Download Coulomb's Law: Investigating Electric Force with Interactive Simulation and more Lab Reports Physics in PDF only on Docsity!

Laboratory # 2 – Coulomb’s Law

Name: ____________________________ PHY 2220Z/Section:_________________ Score:________/72 Pt Instructions: Completing this worksheet

  • You may either complete this worksheet by annotating the PDF file with embedded text or print a hard copy and handwrite your responses. Submission
  • If you complete this worksheet on a hard copy, scan, or take pictures of the completed lab handout, consolidate the pages into a single PDF file, and upload it to Brightspace.
  • Provide the link to the shared spreadsheet so I can review your work and give full credit.
  • Plot the graphs using an Excel spreadsheet, take screenshots, and consolidate the images into a Word document or PowerPoint presentation. Then upload it to Brightspace. Purpose: To deepen students' understanding of Coulomb's Law by investigating how electric force varies with charge magnitude and distance through interactive simulation, observation, and data analysis. Objectives: In this experiment, you will
  1. Predict how electrostatic attraction/repulsion changes as a function of distance between charged particles.
  2. Predict how electrostatic attraction/repulsion changes as a function of the magnitude of charge between charged particles.

Overview: In Lab #1 , we learned that neutral objects become charged through friction as electrons transfer between them, depending on their tendency to gain or lose electrons. A charged object can transfer its charges to another object through contact or induce polarization through induction by charge redistribution. In this lab, we will explore how opposite charges attract and like charges repel, investigate the factors affecting the magnitude of these forces, and ultimately derive Coulomb's Law in three parts. This interaction, whether attractive or repulsive, is specifically referred to as the electrostatic force, or more generally as the electric force. In Part I , we will explore how the electric force changes with varying charge magnitudes by collecting data, creating graphs, and confirming the proportionality predicted by Coulomb's Law. According to Coulomb’s Law, “The magnitude of the electric force that a charged particle exerts on another is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.” Mathematically, the magnitude of this electrostatic force FE acting on two charged particles (q 1 , q 2 ) is expressed as:

𝑟^2

where r is the distance between the charged objects and k is a constant of proportionality, called the Coulomb constant, k = 8. 99 × 10^9 Nm^2 /C^2. In Part II , we will examine how the electric force depends on the distance between charges, again using data collection and graphical analysis to validate the inverse square law and calculating the proportionality constant k that makes up Coulomb’s law. In Part III , we will determine the value of the proportionality constant k in the Coulomb’s law equation.

  1. Collect 10 data points for each dataset, creating tables with 2 columns and 10 rows:
  • Dataset 1: Fix q 2 and vary q 1. Record FE while keeping all other parameters constant. The table should include columns for q 1 and FE.
  • Dataset 2: Fix q 1 and vary q 2. Record FE under the same conditions. The table should include columns for q 2 and FE. Use the table below to collect your data, noting the values that you keep constant. Dataset 1 ( 10 Pt) Distance =____________; q 2 =_______________ Dataset 2 ( 10 Pt) Distance =____________; q 1 =_______________ Electric Field, N (FE) Charge 1, μC (q 1 ) Electric Field, N (FE) Charge 2, μC (q 2 ) *Use Excel to graph each of the above datasets, plotting Electric Force (FE) as a function of charge magnitude. Select an appropriate trendline to fit your data. Make sure to include this trendline with the equation and R^2 value on the two graphs you created.
  • These are Graphs 1 and 2. Take a screenshot and include a description in the figure caption (e.g., a plot of electric force (FE) as a function of charge magnitude (q 1 )). Then, share the link to your shared Excel spreadsheet with me. (10 Pt)
  1. Describe the relation observed between Electric Force and Charge Magnitude and confirm that that is consistent with Coulomb’s Law. (2 Pt)

Part II: Exploring the Relation between Electric Force and Charges Distance.

  1. Describe how you can measure the relation between the charges distance and the electric force acting on them using the simulation. Hint: consider a similar approach as in Part I. (2 Pt)

*2) Using the rationale, you described above, collect 10 data points for the charges distance (r) and electric field (FE) relation. ( Note: Please convert the distance unit from centimeters (cm) to meters (m) to use SI units). (10 Pt) Electric Field, N (FE) Distance, m (r) *Make a graph of Electric Force as a function of Charges Distance using Excel. Choose an appropriate trendline to fit your data. Make sure to include this trendline with the equation and R^2 value on the graph you created.

  • This is Graph 3. Take a screenshot and include a description in the figure caption (e.g., a plot of electric force (FE) as a function of distance (r)). Then, share the link to your shared Excel spreadsheet with me. ( 5 Pt)

Please make any suggestion that you think could improve future laboratory activity. (1 Pt)