Module 2-2 Equipotential II

docx

School

Coastline Community College *

*We aren’t endorsed by this school

Course

Subject

Physics

Date

Feb 20, 2024

Type

docx

Pages

Uploaded by GeneralIbis4046

Physics 9L/19L Module 2.2: Electric Potential II Module 2.2: Electric Potential & Electric Field II Abstract: You will once again determine the electric field by measuring electric potential for a particular charge distribution, but this time you will create the shape of that charge distribution by using conducting ink to draw the electrodes. You will then use conducting paper to measure the potential and sketch out the electric field. Learning Goals: After completing this lab, you should be able to: 1) Visualize and predict the shape electric fields and electric potential resulting from the shape of your electrodes 2) Estimate the magnitude of the electric field from the measured equipotential lines. Important reminders:  You do not have access to the lab computers outside of your lab session. o Email all photos, screenshots, data tables, etc. to yourself before leaving the lab! o See https://www.take-a-screenshot.org/ for instructions on how to take a screenshot of a selected area (Windows, Mac, Linux, etc.)  Although you’re working with a lab partner, all written explanations in the lab must be your own. PART 1: OVERVIEW  You will repeat one electrode configuration from last week. Choose the configuration you did not finish, felt you had to rush through, or would like to explore in more detail.  You will create your own configuration.  For both configurations, you will map out the equipotential, sketch the related electric fields, and estimate the magnitude of the electric field at various positions. PART 2: EQUIPMENT SETUP Completion: work must be completed in lab This video shows the basic setup for this week: https://www.youtube.com/watch? v=gbOawCtFddU 1. Creating the electrode configurations a. You will use a conducting ink pen on semiconducting paper to create your own electrodes configurations. i. Configuration 1 : Repeat of one electrode configuration from last week (See Figure 1 for two of the three configurations from Module 2.1) ii. Configuration 2 : Your own design consisting of only two electrodes . You can use the green template for circles, rings, or lines if you would like.

Physics 9L/19L Module 2.2: Electric Potential II b. The solvents in the conducting ink pen are strong, so do this step outside . There are 4 pens per lab session, so you only 4 groups can work at a time on this. i. The ink takes at least 10 minutes to dry; do not bring the configuration back into the lab room until it is completely dry. c. You can inspect your electric setup (Step 2.a. below), make predictions and answer preliminary questions (Part 3) while waiting for the conducting ink to dry. Safety First! 1. DON’T touch wire ends or conductive (metal) pushpins while the power is on. 2. NEVER touch electrical equipment with both hands at the same time (because it creates a path through the heart). 3. BEFORE moving the wires or pushpins a. Turn the Power supply OFF . b. Use the DMM to CHECK that the potential difference across the two pins has reached 0.  The output you’re using is 5 Volts (DC), 0.5 Amps (=500 mA). A current as low as 60 mA can stop the heart in a matter of 3 seconds. 2. Electric Setup a. This week, you’ll be using the 5- Volt, 0.5 Amps output from the power supply. The wires should already be connected to the power supply for you. If not, or if they come loose, call your TA over to reconnect them. i. The power should be off. ii. The black lug nut wire should be connected to ground. Figure 1. Conducting ink on seminconducting paper. Parallel-plate capacitor (left) and two circles (right). Figure 2. Lab equipment, showing a parallel- plate configuration.

Physics 9L/19L Module 2.2: Electric Potential II iii. The red lug nut wire should be connected to the 5 Volt output as seen in Figure 2. iv. The digital multimeter (DMM) probes should be connected to Voltage (black with an alligator clip, red with a pointed probe) b. Once the ink on one of your configurations is dry, place the conductive paper on a cork board. c. Connect your electrodes to the power supply (see Figure 3): i. Make sure that the power supply is off. ii. Secure one of the lug nut wires to one of your electrodes using the metal push pin. iii. Press the push pin through the hole in the lug nut wire, through the electrode you drew, and into the corkboard. iv. Make sure the lug nut wire is flush against your electrode. d. Get ready to take measurements. i. Connect the alligator clip of the black DMM probe to the push pin connected to the black lug nut wire. ii. The red pointed probe will be used to measure the potential at a given location on the conducting paper. iii. You will mark the potential with a dot using a sharpie (although the ink is silver, it is not conductive) Progress Check-in  At this point in the lab, write your table number on the board to indicate you are ready to check in with your TA.  Do not turn on the power supply until the TA has checked your connections! PART 3: PRELIMINARY QUESTIONS & PREDICTIONS Completion: work must be completed in lab 1. Make a prediction of the equipotential contour lines for each of your electrode configurations. We predict the lines to curve around the circular configurations. We predict the lines to be straight near the rectangular configuration. Also, we believe the lines will be perpendicular around every point of the configurations. Figure 3. Lug nut wires are securely attached to the (dry) conducting ink using the metal push pins.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

Physics 9L/19L Module 2.2: Electric Potential II 2. Looking at your predications, describe your plan for the number of points you will locate and the spacing between points you will need to (1) create a detailed equipotential contour and (2) complete mapping out the contours for both of your electrode configurations. Our plan is to draw lines of equal electric potential. Since we know there is a electric field surrounding our electrode configurations, we will draw our lines perpendicular to them. 3. Let’s say that the first position you locate with the red pointed probe gives a reading of 1.03 V on the DMM. What range of values will you accept as locating other positions on the same contour? And what value (in Volts) will you give that contour line? We will accept a point between 1.00-1.05 surrounding our configurations. We will give that contour line a volt value of 1 . PART 4: DATA COLLECTION & ANALYSIS Completion: electric potential contour and electric fields lines must be completed in the lab. Calculations may be completed after lab session. 1. Remember that your TA must check your electrical connections before you turn on the power supply! 2. Remember that after turning OFF your power supply, you must use your DMM to

Physics 9L/19L Module 2.2: Electric Potential II CHECK that the potential difference across the two metal push pins has reached zero before touching the push pins or lug nut wire connections. 3. For the repeated electrode configuration, plot out the equipotential lines (dashed) and draw the electric field lines (solid, with arrows). Make sure the locations you’ve identified with the DMM will be clear to the TA/grader. Progress Check-in  At this point in the lab, write your table number on the board to indicate you are ready to check in with your TA.  Continue working. 4. Repeat Step 3 above for the electrode configuration of your own design. Then, locate 5 positions, A through E, and estimate the magnitude of the electric field at each. ` Location ∆V ∆ x | ⃗ E |

Physics 9L/19L Module 2.2: Electric Potential II A 1V 2in Bottom B 2V 4.2in Bottom C 3V 5.4in Bottom D 1V 1in middle E 3V 2.5in middle 5. Comment on any similarities or differences between your prediction and the measurement of the equipotential contours for your own electrode configuration. Our predictions were similar to the measurement of the equipotential contours for our electrode configuration. We predicted correctly the curve or straightness of each of the lines. The differences between the lines are the spacing and the amount of lines we found using the measuring tools. 6. Comment on the precision of your electric field estimates. How many significant figures are actually meaningful in your values for the electric field magnitudes? What could be done differently to increase the precision of your measurements and calculations? We could have increased the precision of our electric field estimates. Next time we could increase our estimates to about .00-.10. Only the first digit should be considered meaningful when measure the magnitudes of the electric field. To improve our calculations, we could use the equation v=kQ/r. PART 5: REFLECT Completion: Work can be completed after lab session Reflections will always be graded based on completion and a check that your answer is relevant to the question. 1. While this experiment was similar to equipotential I, were there any differences that may have helped you understand the relationship between the shape of the electrodes and the resulting potentials and electric fields? Explain. The equipotential lines were circles around the sphere. 2. Describe something that worked well when doing this lab activity. My partner and I worked together to label our equipotential contour lines. She used the measuring tool to find the points, while I drew all of the points. 3. How did you contribute to this success? I drew all of the points of voltage. I helped with predicting the way the lines would look like.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

Physics 9L/19L Module 2.2: Electric Potential II Sign-off Before leaving the lab,  If you were using the lab computer, o Email all data to yourself. o Remove any data from the common desktop. o Log out of the lab computer.  Reset your lab station to be ready for the next lab session.  Check out with your TA

Related Documents

Radio_Waves_Student_Directions (1).docx

collision lab report.docx

Momentum, Force and Work sample work complete (1).docx

lab 29 report.pdf

physics 6AL lab one-2.pdf

phys 6AL math lab.pdf

WavesonaStringRemoteLab_MiaMartinez.docx

Physics Lab Report #1.doc

Collisions .docx

10 ans.pdf

PHYS 130 Lab 4 (4).pdf

Module 3 Lab 3 Rocket Launch.docx

Recommended textbooks for you

Physics for Scientists and Engineers, Technology ...

Physics

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Cengage Learning

Physics for Scientists and Engineers

Physics

ISBN:9781337553278

Author:Raymond A. Serway, John W. Jewett

Publisher:Cengage Learning

University Physics Volume 2

Physics

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Principles of Physics: A Calculus-Based Text

Physics

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Cengage Learning

Physics for Scientists and Engineers: Foundations...

Physics

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Cengage Learning

Physics for Scientists and Engineers with Modern ...

Physics

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Cengage Learning

SEE MORE TEXTBOOKS

Recommended textbooks for you

Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
University Physics Volume 2
Physics
ISBN:9781938168161
Author:OpenStax
Publisher:OpenStax
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...
Physics
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning