Loading...

Messages

Proposals

Stuck in your homework and missing deadline? Get urgent help in $10/Page with 24 hours deadline

Get Urgent Writing Help In Your Essays, Assignments, Homeworks, Dissertation, Thesis Or Coursework & Achieve A+ Grades.

Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support

Electric field mapping lab report theory

16/10/2021 Client: muhammad11 Deadline: 2 Day

Physics Lab

The lab is already done and the video of the experiment is attached below.

I will Attach Four things below,

1- the lab manual.

2- the video of the experiment, which you need to collect the numbers from (these are the numbers you need to use in the reports).

3- Letter on how to write a lab report.

4- Letter on the grading criteria (how the report will be graded).

Please read the two Letters before reading the manual and watching the video.

The report should be done within 24 hours.

Mapping the Electrostatic Potential and Electric Field

The objective of this experiment is to study the potentials, equipotential curves and electric fields produced by various two-dimensional electrostatic charge distributions. In practice, direct measurement of the electric field turns out to be quite difficult. Instead, we exploit the fact that the electric force is a conservative force, and thus can be considered to be associated with a potential – the electric potential , where the components of the electric field vector are given by the change of the electric potential in that direction,

(1)

One consequence of Equation 1 is that if one can identify a line (or surface) along which the potential has a constant value then the electric field is necessarily perpendicular to that line at all points, see Figure 1. Therefore, in order to map the electric field for a charge configuration, it is sufficient to map out the equipotential lines.

There is a technical difficulty, however, with setting up and controlling static charge distributions: it is not easy to fix charges at precise locations. For this reason we will simulate static charge distributions using a small direct current flowing through electrodes, drawn to look like our static charge distributions, and conducting paper. The electric field shapes, potential and equipotential lines will be identical to those for the simulated static charge configurations.

Figure 1. Equipotentials and electric field lines for a positive point charge (circle at center).

NOTE: You may want to reference your text or other sources to confirm your results and aid in mapping the fields accurately and expeditiously.

Learning Goals for this Laboratory:

· Practice visualizing electric fields and electric potentials around conductors of many shapes.

· Practice graphing and analyzing nonlinear relations.

· Practice connecting simple circuits.

Apparatus
Pasco field mapping board, digital voltage meter with point probes, D.C. power supply, several sheets of conducting paper with different electrode configurations, push pins

Figure 2. Setup for Part IV of this lab showing the cork board with the parallel plate electrode configuration on conducting paper, voltmeter and D.C. power supply.

Part I. Point Source and Guard Ring
Figure 3. Point source and ring guard configuration. Voltmeter probes not shown.

1. The electrodes in this experiment are made with conducting silver paint on conductive paper. Locate the conductive paper with the point source and guard ring electrode configuration (Figure 3) and pin the corners of the paper to the cork board.

2. Take a cable with a banana plug on one end and a ring terminal on the other and plug the banana end into the positive of the power supply, then pin the ring terminal end of the cable into the central point electrode using a metal pushpin as in Figure 3. Make sure there is good contact between the ring terminal and the painted electrode. Try to avoid making new holes in the electrode with the pushpin, it is sufficient to have physical contact between the terminal of the wire lead and the silver of the electrode.

3. Similarly, connect the negative of the power supply with the circle-shaped guard ring electrode.

4. Turn on the power supply and set it to 5 V by first increasing the current limit knob, then increasing the voltage to 5 V. This voltage provides a continuous source of charge to the electrodes, creating the electric field and potential we will measure.

5. Before measuring the field and potential, let’s check the electrodes for proper conductivity (a damaged electrode could skew your results).

If the electrode is a good conductor, all points on the electrode should have nearly the same potential. For our purposes, the maximum potential between any two points on a single electrode should not be more than a few mV. Use the voltmeter to probe the potential between different points along an electrode. Please do not push the voltmeter probes through the paper; simply placing the probes on the paper should give you a good reading. If you see a potential larger than a few mV between different points on an electrode, first check that the power supply wires are firmly connected to the electrode via the pushpin. If you still see a potential where there shouldn’t be one the electrodes could be damaged, so ask your lab instructor to double-check your setup and get a replacement electrode if necessary.

6. Once you’ve checked for good conductivity, you’re ready to measure the potential of the point source. Place the black (common) voltmeter probe on the guard ring so that it is the reference, and use the red probe to measure the voltage starting at the point 2 mm from the edge of the point source and ending 20 mm from the point source at intervals of 2 mm. In this way, you will have 10 data points: 2, 4, 6, 8, and 10 mm from the point source. If it helps, you can use a pencil to mark the 2 mm points. The voltage at 2 mm should be somewhere in the 3 - 5 V range.

7. Make a graph of the potential as a function of distance from the point source (the edge of the point source is at = 0.0 cm, and = 5 V).

8. Make a second graph of potential vs. (do this by having Excel calculate in new column).

Question 1. According to theory, how does the potential of a point charge vary with distance as you move away from the point charge? Is this what your graph shows? For an ideal point source, the graph of potential vs. should be a line, is yours a line? Our point source is not ideal because the negative electrode is not infinitely far away. However, very near the point source the negative electrode is sufficiently far away as to have no influence, thus the first few points at higher voltage in the graph should follow a linear trend.

9. Mapping equipotential lines. Use the voltmeter to find equipotentials by keeping the black probe on the negative electrode and placing the red probe at a point somewhere inside the circle. Watch the voltmeter voltage reading while you slide the red probe along the paper while also trying to keep the voltage constant. This line of constant potential is an equipotential. Try doing this for one or two other values of potential nearer and farther from the point source.

Question 2. What are the shapes of the equipotentials in the region around a point source? Do your results agree with the equipotentials show in Figure 1?

10. Briefly survey the potential in the region outside the guard ring.

Question 3. Does the potential vary much from one point to another outside of the guard ring? What does this imply about the electric field outside the guard ring? Refer to equation 1 for help with your answer.

Part II. Electric Dipole
1. Replace the point source electrode with the electric dipole configuration and connect the leads to the 5 V source as in Fig. 4, making sure the pushpins provide good contact between the ring terminal and the silver paint.

Figure 4. Dipole configuration. Voltmeter probes not shown.

2. Place the black reference voltage probe halfway between the two electrodes, we’ll keep it fixed at this location. Place the red probe somewhere on the paper. Then slide the red probe along the paper while watching the voltage reading. Use this method to map out several equipotential curves nearer and farther from the point charges. Record your results on the white grid paper provided. To see what the shape should be in theory, refer to online or text sources for the potential of a dipole.

3. After drawing several equipotentials on your grid paper, use a different color to draw in the corresponding electric field lines. To do this, start at the positive charge and draw a line moving outward such that it crosses any equipotential lines at right angles. The electric field lines should terminate at the negative charge. Be sure to indicate the direction of your e-field with arrows along the lines. To see what the shape of these field lines should be, refer to online or text sources for the electric field of a dipole. Once you have several field lines drawn, take a picture of the resulting map of electric field and potential for your lab report.

Question 4. Note all but one of the equipotential lines for a dipole are curved. Where is the uniquely straight equipotential line for a dipole?

Part III. Like Charges in a Box
1. Set up the configuration shown in Fig. 5 and apply 5 V. Note that the two point charges are positive, you can use a wire to daisy-chain them together so they are both charged. Also note that the box electrode surrounding the point charges is negative. As in Part II, place your reference voltage probe halfway between the two electrodes.

Question 5. Relative to this halfway point, where on the conducting paper is the potential highest? Where is it lowest?

Figure 5. Like Charges in a Box. Voltmeter probes not shown.

2. As you did with the dipole, map out a few equipotential lines near the point charges and also near the walls of the box. Make a rough map of these equipotentials and their corresponding E-field and include it with your lab report.

Part IV. Parallel Plates
Figure 6. Parallel plate electrodes (blue lines) connected to power supply. Voltmeter probes not shown.

The potential and field in between charged parallel plates differs significantly from that of a point source (Part I).

1. Connect the parallel plate electrodes to a power supply as shown. Measure the potential every 0.5 cm along a line from the midpoint of the negative electrode to the midpoint of the positive electrode (i.e. along the dotted line in the figure at right). Use the negative electrode as the fixed reference for your measurement.

2. Make a graph of the potential as a function of distance from one plate (the reference probe is at = 0.0 cm).

Question 6. Referring to your graph, describe in how the potential changes with distance from the electrode. How does this contrast to the potential vs distance for a point source you found in Part I?

For Your Lab Report:
Refer to the lab syllabus and grading rubric for what to include in the report. It may be helpful to use the answers to the questions to aid in writing the discussion.

1

Homework is Completed By:

Writer Writer Name Amount Client Comments & Rating
Instant Homework Helper

ONLINE

Instant Homework Helper

$36

She helped me in last minute in a very reasonable price. She is a lifesaver, I got A+ grade in my homework, I will surely hire her again for my next assignments, Thumbs Up!

Order & Get This Solution Within 3 Hours in $25/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 3 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 6 Hours in $20/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 6 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 12 Hours in $15/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 12 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

6 writers have sent their proposals to do this homework:

Coursework Help Online
Innovative Writer
Math Exam Success
Calculation Master
Essay Writing Help
Assignments Hut
Writer Writer Name Offer Chat
Coursework Help Online

ONLINE

Coursework Help Online

I am a professional and experienced writer and I have written research reports, proposals, essays, thesis and dissertations on a variety of topics.

$16 Chat With Writer
Innovative Writer

ONLINE

Innovative Writer

I will provide you with the well organized and well research papers from different primary and secondary sources will write the content that will support your points.

$28 Chat With Writer
Math Exam Success

ONLINE

Math Exam Success

As per my knowledge I can assist you in writing a perfect Planning, Marketing Research, Business Pitches, Business Proposals, Business Feasibility Reports and Content within your given deadline and budget.

$28 Chat With Writer
Calculation Master

ONLINE

Calculation Master

This project is my strength and I can fulfill your requirements properly within your given deadline. I always give plagiarism-free work to my clients at very competitive prices.

$24 Chat With Writer
Essay Writing Help

ONLINE

Essay Writing Help

This project is my strength and I can fulfill your requirements properly within your given deadline. I always give plagiarism-free work to my clients at very competitive prices.

$35 Chat With Writer
Assignments Hut

ONLINE

Assignments Hut

As an experienced writer, I have extensive experience in business writing, report writing, business profile writing, writing business reports and business plans for my clients.

$43 Chat With Writer

Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam.

Similar Homework Questions

How to install hwic card in cisco router - Final Assignment - Good vocabulary words to use in a story - When managers pursue a multidomestic strategy, they most likely use a _________________ strategy. - Policy Brief - My dog poem by marchette chute - Nursing Informatic Telehealth Reearch - Governor elect plural - Discrete mathematics lecture notes ppt - I need 900 words on Project Planning Techniques - Pharma peer replies - Linear Project - Different levels of health promotion - Mass media ethics case studies - Assignment Due In less than an Hour! - Pied piper costume diy - Describe the steps in developing a flexible budget - Discussion Question(AG) - Alone together by sherry turkle summary - Shell tellus s2 vx 46 msds - Nathaniel hawthorne interesting facts - Meiosis animation mcgraw hill - Https ng cengage com login - Hope by lisel mueller - Three sphere model for systems management pdf - Miss tina jones - Despicable me 3 124movies - Managerial accounting edition by balakrishnan sivaramakrishnan and sprinkle - Data flow diagram level 0 - The t test for nursing - Is flat rate simple interest - Math 221 statistics for decision making week 4 ilab - Concept development practice page 2 1 physics - Strategic management multiple choice questions and answers - Procter and gamble sds - Eat drink man woman netflix - Adria lopez created success systems on october - Is the dog barked a complete sentence - A dark brown dog questions and answers - Redox titration vs acid base titration - Edi 940 implementation guide - Real and complex analysis solutions pdf - Martins trailers o connor - Paper due tomorrow - Determination of the ka for a weak acid lab - 2 1/6 as an improper fraction - Trade discount is calculated by - 3 phase uk colours - Hi can someone plz write this for me? Thanks - Political lens of the us constitution - Https canvanizer com new business model canvas - British army lanyard colours - Wireless fingerprint attendance system - The eagle of zeus - LDR531 Week 2 Comparing Leadership Models - Health care to undocumented immigrants - Specific speed of axial flow pump - Hartford research issues bonds dated january 1 2015 - MA GD2 - Austin sports and social club rock n roll - Assignment - Anthea askey cause of death - Which one of the following statements concerning the balance sheet is correct? - Unit IV Case Study(For Dr.Ellen RM) - First angle projection symbol - Https online schoolbytes education sport - Ansi vs asme drawing standards - Their eyes were watching god narrator - Art discussion - Libreoffice calc random number - The helping process assessment to termination - Attributed personal service income - Ap government chapter outlines - Ib computer science notes - Facts about ionic compounds - Garth owns two all terrain vehicles - Information Governance - Discipline reflections essay - Reasons for using effective vocal delivery in a professional context - Brisbane floods 2011 environmental impacts - Mpi world education congress - Acknowledgement for project report - Mt gambier to adelaide - Live ziarat najaf e ashraf - Margaret o'donnell blackrock clinic - Debits and credits cheat sheet - Possible errors in limiting reactant experiment - Laa1920 - Tax residency self certification computershare - Discussion and paper - Social work case studies foundation year 2013 pdf - 302 - Cisco fmc virtual datasheet - Red headed hostess light the world - Nr 443 community health nursing - 36v house solar panel to 12v battery - Best language for ecommerce - Coast guard station able is located 150 miles - Acs chemical biology template - Eliminating wordiness exercise 1