Wright State UniversityEE 2010L

Circuit Analysis Lab: Bench Sections

TA

Office Hours

Attendance Attendance is critical and mandatory, and you must attend your scheduled labperiod. There are no unexcused absences from labs. An unexcused absence from alab period will result in an automatic grade of zero for that lab assignment, with noexceptions. If you have an emergency, it is your responsibility to contact your TA as soon aspossible to arrange a time to make up the lab. Also, you will have to provide documentationregarding your absence in order to be allowed to make up the missed lab.

Prelab Each lab assignment contains a prelab exercise. Both the lab assignments and prelabexercises are available on the Pilot page for your lab section. You must read the week’s labassignment and complete the prelab exercises prior to each week’s lab period. The prelabmust be submitted to the EE department dropbox by 5pm the week before the lab. The TAwill grade and return them at the beginning of the lab. See the table below for a schedule ofprelab due dates and times.

Lab Day Prelab Due Date

Monday or Tuesday by 5pm previous Thursday

Wednesday or Thursday by 5pm previous Friday

Data You will have the entire period of your lab section to complete the week’s lab. This usuallymeans wiring a circuit and taking measurements to collect data. You will record data oncarbon paper, which is provided in the lab, and you will turn in a copy of your data to theTA before leaving. The data in your lab report must match the data you submit at the endof the lab period.

Lab Reports You will have one week after the completion of a lab to write and submit a labreport. Your lab report must follow the formatting rules described in this syllabus, andfailure to do so will result in a significant grade reduction. You must submit an electroniccopy of your lab report (in .doc, .docx, .rtf, or .pdf format) to the dropbox in Pilot. Nolate labs will be accepted for any reason. If the TA is not able to open the lab report,you will receive a zero on that lab report. No re-writes will be allowed for any lab report.

Grades Your lab grade will be determined by the total number of points you receive over thecourse of the semester. Each prelab is worth 10 points, and each lab report is worth 40points. There will be a lab midterm worth 100 points and a lab final worth 200 points. Seethe table below for a breakdown of lab grades.

Assignments Number Points Each Total Points

Prelabs 10 10 100

Lab Reports 10 40 400

Midterm 1 100 100

Final Exam 1 200 200

800

No individual grades will be dropped, there will be no extra credit, and grades will beassigned using a standard percent-based system, as outlined in the table below.

Percent Points Grade

90-100 720-800 A

80-90 640-720 B

70-80 560-640 C

60-70 480-560 D

0-60 0-480 F

Academic Dishonesty Any occurrence of academic dishonesty will result in automatic failureof the course, and the incident will be reported to Judicial Affairs. While you will beworking with partners to collect data during the lab period, you all must write your own labreports individually. Any identical lab reports received will result in those studentsreceiving an F for the lab course, as well as being reported to Judicial Affairs for anacademic integrity violation.

As part of the submission process, lab reports will be scanned for originality and receive apercent score showing how much they match other previously submitted material, websites,etc. Any lab report showing an originality score of greater than 40% will be consideredplagiarised and will receive a zero grade for the assignment. Examples of behavior that willbe considered an academic integrity violation are:

• Submitting someone else’s lab as your own

• Using someone else’s lab data to write your report

• Falsifying lab data to get better results

• Re-using a lab report from a previous term

• Posting lab or pre-lab questions online to solicit answers

• Consulting other students’ previously submitted lab reports

If you have questions about what would or would not constitute an academic integrityviolation, you are encouraged to ask your TA or instructor!

Your Responsibilities As a student in this class, the following behavior is expected of you:

• Attend all classes and complete your assignments on time.

• Treat your fellow students, instructors, and other college employees with respect.

• Participate appropriately and actively on topics presented in class.

• Resolve problems by immediately discussing issues with your instructor and/or peers.

Statement of Non-Discrimination The Electrical Engineering Department staff and facultyare committed to the open and free exchange of ideas that characterize a universityenvironment. The teaching faculty for this course will not tolerate any discriminatorybehavior from students. Students should also realize that making such an accusation againsta member of the course staff is a serious allegation. If a problem arises, it will beinvestigated thoroughly. Unfounded accusations will be dealt with severely. Seehttp://www.wright.edu/students/judicial/policies.html for more information.

Lab Report Formatting Instructions

Your lab reports must be professional-looking and properly formatted. Any equations must beformatted using an equation editor, and any tables must be logically laid out and include properheadings and units. You should use complete sentences, proper punctuation, and correct grammarand spelling. Your lab reports must contain the following sections:

• Cover Page The first page of your lab report must be a cover page. Centered on the page,on separate lines, you must include:

– The lab number and title

– Your name

– TA: your TA’s name

– Partner: your lab partner’s name

• Abstract/Introduction The first few paragraphs of your lab report should describe themain theory that was studied in the lab. You should summarize how you collected data andany calculations you made. You should also succinctly describe whether or not your resultssupported the theory you were trying to demonstrate.

– Acceptable Example: In this lab, we studied the basic relationship between current,voltage, and resistance. This relationship is known as Ohm’s Law. Ohm’s Law isdefined as V = IR, where V is the voltage (measured in Volts), I is the current(measured in Amperes), and R is the resistance (measured in Ohms). Our resultssupported this relationship.

We measured voltage and current at various resistors in a network. Then we multipliedthe measured current values by the resistor value. We calculated a percent differencebetween the calculated voltage and the measured voltage. Our percent difference wassmall enough to say that the experimental results matched the theoretical data.

– Unacceptable Example: This lab was about ohms law. Ohms law is V=IR. All of ourcalculated I and R values were the same as the V value we measured. This was a godexperiment I learned a lot from it and it showed me ohm’s law. Ohm’s law isinteresting and every engineer should know about it.

– Reason this is unacceptable: There is no explanation of Ohm’s Law; the equation is notentered with an equation editor; and there is no description of how the lab wasperformed (i.e., how the measurements were taken and caluclations made). Also, thereis poor grammar and spelling.

• Data Each lab will involve collecting data. You must display that data in a reasonable andcoherent table. Most labs will include a percent difference between values you calculated inthe prelab exercise and the values you measure in the lab.

– Acceptable Example:

Calculated Measured Percent Difference

v(V) i(mA) R(kΩ) v(V) i(mA) R(kΩ) i% R%

1.00 1.00 1.00 1.00 0.97 1.12 3.56 11.32

4.00 2.00 2.00 4.01 2.21 1.95 9.98 2.53

6.00 2.00 3.00 5.87 2.01 3.14 0.50 4.56

10.00 2.50 4.00 10.00 2.45 4.02 2.02 0.50

– Unacceptable Examaple:

v v i i % R R %

1 1 1 0.965 3.562341 1 1.12 11.320754 4.01 2 2.21 9.976247 2 1.95 2.5316466 5.87 2 2.01 0.498753 3 3.14 4.560261

10 10 2.5 2.45 2.020202 4 4.02 0.498753

– Reason this is unacceptable: There are no units given; it is not clear which values aremeasured and which are calculated; the numbers do not have the same precision(number of decimal places); and the table is sloppy and does not look professional.

• Sample Calculations In this section, you should show how you used each equation. Youshould show an example of the calculations you performed on your data, starting with theequation in variable form, substituting data for each variable, and ending with an answerlabeled with appropriate units. You only need to show each calculation or equation onetime, even if you used the equation many times in your calculations. Remember to use anequation editor to format the equations; hand-written equations will not be accepted.

– Acceptable Example: In our prelab, we used Ohm’s Law (shown in Equation 1) tocalculate the expected voltage and current for each resistor. After gathering our data,we then used Ohm’s Law again to calculate the voltages based on our measuredcurrents and resistances. A sample of these calculations is shown below.

V = IR (1)

V = (2.25mA)(500Ω)

V = (2.25× 10−3A)(500Ω)

V = 1.125V

After collecting all of our data and completing our Ohm’s Law calculations, we thencalculated the percent difference between the measured and calculated voltages usingEquation 2, shown below. A sample calculation is also shown below.

Percent Difference =|A−B|(A + B)

2

· 100 (2)

=|1.10− 1.25|(1.10 + 1.25)

2

· 100

= 12.8%

– Unacceptable Example:V=IR=2.25mA*500ohms=1.125V% Difference=ABS(A-B)/[(A+B)/2]*100=ABS(1.1-1.25)/[(1.10+1.25)/2]*100=0.15/1.175*100=12.8%

– Reason this is unacceptable: The equations were not formatted with an equationeditor. There is no explanation given for the calculations, no variables are defined, andinconsistent units are listed. It is unprofessional and hard to understand.

• Questions Each lab assignment has a list of questions at the end that you must answer.Your answers should be complete, thorough, and written in a detailed and logical manner.You should use equations numbers to reference any equations you mention, and appropriateunits must be used. Hand-drawn diagrams are acceptable, if they are needed to answer agiven question.

• Error/Conclusion You are expected to be careful and diligent when performing anyexperiment and taking data; however, it is extremely rare for measured values to exactlyequal theoretical values, and the purpose of this section is to explain any errors in yourcalculations and measurements.

It is unacceptable to claim human error or say that you “messed up” while taking data, anddoing so will result in a zero grade for the lab assignment. If you are aware that you erred,it is your responsibility to redo the measurements. It is also not acceptable to say that youdon’t know why there were errors.

There is no room in a lab report for your personal feelings on how you think the lab went orhow much you enjoyed it. The report should be as objective as possible, and this meanseliminating any statements of opinion or emotion.

– Acceptable Example: As our percent error is not zero, we know there is some errorinvolved in the measurement. The largest error in this lab comes from resistance in thewires connecting the components. When we measured the voltage and current, there isan additional resistance in the wires of the multimeter. This resistance is not factoredinto our Ohm’s Law calculations.

– Unacceptable Example 1: There was no errors here it was a good lab. All theequipment worked well, I enjoyed the lab.

– Reason this is unacceptable: Every lab has errors and uncertainties, and nomeasurements are completely ideal. This is not an acceptable space for your personalcomments on the lab.

– Unacceptable Example 2: The biggest error here was me and my partner did not set upthe circuit appropriately. We weren’t sure how to use the multimeter the right way so Ithink some of our errors are because of that. Also we didn’t measure the value of theresistor we just went with what was on the color bands. So they are probably notcompletely accurate either.

– Reason this is unacceptable: This student is saying he or she did poor work. Sloppinessand laziness are not acceptable excuses.

Study Guide/Course Schedule

• Week 1 Lab 1: Basic lab equipment; measuring resistance, voltage, and current

– DUE: Prelab 1 (by 5pm, Friday, August 29 in EE dropbox, 311 Russ)

• Week 2 No lab meetings

– DUE: Lab 1 Report due (one week after your lab section; upload to Pilot) and Prelab 2

• Week 3 Lab 2: Resistor color code; breadboarding

– DUE: Prelab 3

• Week 4 Lab 3: Ohm’s Law; equivalent resistance

– DUE: Lab 2 Report and Prelab 4

• Week 5 Lab 4: Potentiometers; multi-loop circuits

– DUE: Lab 3 Report and Prelab 5

• Week 6 Lab Midterm

– DUE: Lab 4 Report

• Week 7 Lab 5: Current-dividers; voltage-dividers

– DUE: Prelab 6

• Week 8 Lab 6: Node voltage and mesh current

– DUE: Lab 5 Report and Prelab 7

• Week 9 Lab 7: Thevenin and Norton equivalent circuits

– DUE: Lab 6 Report and Prelab 8

• Week 10 Lab 8: Using an oscilloscope

– DUE: Lab Report 7 and Prelab 9

• Week 11 Lab 9: First-order circuits

– DUE: Lab Report 8 and Prelab 10

• Week 12 No lab meetings

– DUE: Lab Report 9

• Week 13 Lab 10: RLC circuits

• Week 14 No lab meetings

– DUE: Lab Report 10

• Week 15 Lab Final

EE 2010L Syllabus Acknowledgement PageRemove this page from your syllabus and turn it in to your TA before leaving lab the first week.

I have read and understand the syllabus. I am aware of the following important items from thissyllabus:

• All labs and prelabs count and none will be dropped from the final grade calculation

• Late labs and prelabs will not be accepted for any reason

• Prelab exercises are to be submitted to the EE department dropbox (311 Russ)

• Lab reports are to be submitted online through Pilot

• Grades will not be assigned on a curve

• All students will be treated the same, and I will not ask for special consideration regardingmy grades

• I am expected to behave in an ethical manner at all times

• All work I submit will be wholly my own work

• My lab partner and I are to turn in separate and distinct lab reports

• My lab report will not be identical to my lab partner’s

• Lab reports with originality scores of greater than 40% will be considered plagiarized andwill receive a zero grade

• If I submit work that is not my own, I understand that I am violating Wright State’sacademic integrity policy

• If I violate the academic integrity policy, I will automatically fail the lab course, and theincident will be reported to Judicial Affairs.

Student Name (printed):

UID:

Student Signature:

Date: