PH221 – Week 1 Lab
Before you can start working on the labs you must set up an account at KET Education and download the labs to your computer. Please follow these directions to access your physics labs.
Welcome to the Lab component of Physics II. All our labs use simulation applications of real laboratory equipment that are combined with measurement and graphing tools to allow you to explore, observe and analyze experiments. Each week you will complete one laboratory exercise using a virtual lab application and then use your results to write a formal lab report. Each experiment will be based around one main topic.
For this week’s lab you will use the Electrostatics simulation. Download and read the following user guide to familiarize yourself with the simulation.
Download the instructions for two laboratory activities you will complete this week. You may wish to print them out and use to collect and organize your results.
Use the data and answers to the laboratory questions to help you write your lab report. Your lab report should focus on calculating the coulomb force acting on the charged pith balls and the charge on each pith ball. Then you should compare those experimental results with the actual charge indicated in the simulation.
The lab report will have the following six sections. Include section headings in bold at the beginning of each section.
Introduction – Explain the purpose of this laboratory and what results you expect to see in this experiment.
1.Background – Discuss the concepts that form the foundation for this lab. You should address what you learned from the weekly lectures and readings that are related to the lab.
2.Methodology – Describe the apparatus that was used in the experiment(s) and how it was used in performing the experiments. Also explain what tools were available within the laboratory that allowed you to collect or analyze the data.
3.Data – Enter the data that you collected in the lab. You can use screen shots from the Data Table within the Pivot Interactives labs. Data should be clearly labeled with physical quantities and units.
4.Analysis – Analyze your results. If your Data Table included Calculated Columns, then the equation you used in those calculations should be included and described here. Any graphs created with the data go in this section, as well as your interpretations of their meaning. Were your results consistent with your original expectations?
5.Conclusion – Provide a concise summary of the results of your experiment(s) – what you did, what you found and what it means. Speculate on possible sources of experimental error and/or uncertainty within the experiment. Describe an additional experiment that could be run with this equipment to expand on what you’ve learned OR explain how you could use this equipment to answer another real-world problem.
PH221: Rubric for Laboratory Assignment 4
OVERRIDE GRADE OF 1:
If a PDF file is used, name and GID must be on each page.
All of most of the screenshots are missing.
Screenshots lack a time stamp (when indicated)
Lab worksheet file(s) not submitted along with the lab report.
The following screenshots required with a computer timestamp included:
Use the answers to the laboratory questions to help you write your lab report. Your report will focus on measuring the emf induced in a coil of wire when the magnetic field varies. You should discuss the factors that influence the magnitude of this emf.
The purpose of the lab is clearly stated and is aligned with the lab objectives. Expected results are proposed.
The purpose of the lab and expected results are stated and consistent with the assignment.
The purpose of the lab and expected results are stated but lacks clarity or is not consistent with the assignment.
The stated purpose is not aligned with the lab objectives or missing key elements.
The introduction is missing.
The concepts that form the foundation of the lab are discussed. Reference to the weekly lectures or readings are made.
Concepts that underly the lab are discussed, but no reference is made to the weekly lectures or readings.
Concepts that relate to the lab are discussed but are vague or contain minor errors.
Underlying concepts are described but reveal major errors in understanding.
The background was not addressed
-Include a screenshot of the Faraday apparatus and description of how it works.
Methods, materials and equipment are specifically described using proper terminology. Concise, but detailed, procedure is provided.
Methods, materials and equipment are described, and a detailed procedure provided, but minor errors in terminology or descriptions are made.
Materials, methods and equipment are described, and a procedure provided, but they are too brief or vague to easily follow.
Some materials, methods and procedures are described, but they are not coherent or missing major pieces.
The methodology was not provided.
- Screenshots corresponding to “Faraday_Bmin_max.png"
-Completed Table 1 – Magnetic Field at 5 Positions
Adequate data is collected in the lab is presented in a logical way that is organized and clear. Data is relevant to the purpose of the lab. Tables and observations are complete, clearly labeled, and physical quantities and units are given when appropriate.
Adequate data is provided and relevant to the purpose of the lab, but with minor errors in labeling or units. Tables and observations are complete and generally include captions and units.
Relevant data is provided, but it is not adequate to address the purpose of the lab or contain errors or omissions so that it is difficult to derive useful information from the data.
Data provided is not relevant to the purpose of the lab. Data is not organized or major errors in labeling and units appear throughout.
Little to no organization of the data was present. Lacks data.
- Completed Table 2 – Emf measured by Pickup Coil
- Discussion of the factors that influenced the magnitude of the induced emf.
Data is analyzed appropriately, and key results are presented in a logical sequence. All required calculations are included. Sample calculation(s) are provided to show how the calculations were done. All variables include units when appropriate.
Data is analyzed, but with some details missing. All required calculations are included but with minor errors.
Data is analyzed, but with key details missing or inaccurate. One of the required calculations is missing or major mistakes made in the calculations.
Data analysis is included but does not include the required calculations or major errors in the calculations are made.
Date analysis is lacking.
Conclusion contains a concise summary of the results, speculates on the possible sources of error and uncertainty in the lab, and proposes an experimental extension of the lab or applies its concepts to a real-world situation.
Conclusion is provided, but only two of three elements are well addressed.
Conclusion is provided but only summarizes the results.
A conclusion is provided, but does not communicate useful information about the results, sources of error or possible laboratory extensions.
A conclusion was not provided
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Explanation & Answer
Here is the final report. I have also attached the completed worksheet.There are three files attached. The "Coulomb's_Law_Report" file is the final draft of the report. The "Coulomb's_Law_PDF" file is a PDF file of the completed worksheet. The "Coulomb's_Law_Worksheet" file is a MS Word document that has the written answers for the worksheet. I typed out the answers just in case there was any confusion with the written answers in the PDF file. The answers in the word document go in the order on the worksheet, and they have the same assigned numbers as in the worksheet.Please let me know if you have any questions or concerns, or need a different format for the final report.
Coulomb’s Law Lab
This laboratory experiment explores the effects of Coulomb’s law on two identical, spherical pith
balls. A simulated lab is used in order to find the theoretical charge on each pith ball. The
measurements taken from the simulated lab were then used to calculate the objective of this lab;
the charge on each pith ball. The Coulomb force acting on the pith balls, as well as the charge on
each pith ball, are analyzed and compared for both the theoretical and experimental procedures.
Because of the principles behind Coulomb’s law, it is expected that both the experimental and
theoretical values will be greatly similar.
Coulomb’s law describes the electrostatic force between two charged particles. When two
charges, 𝑞1 and 𝑞2 , are separated by a distance 𝑟, Coulomb’s law can describe the electrostatic
force between them as follows:
where 𝑘 is Coulomb’s constant. This electrostatic force decreases by the ratio of 𝑟 2, which is also
known as the inverse square law. In an experiment, this inverse square law relationship can be
observed when the distance increases because the magnitude of the force will decrease by the 𝑟 2
This electrostatic force, Coulomb’s force, is what causes the two charged particles to repel one
another. If the two pith balls have the same charge but opposite sign, they will repel and separate
by some distance 𝑟.