PHYS3330: Lab Report

1. PHYS3330: Lab Report * The purpose of the record of an experiment is to explain clearly and concisely what you are trying to do, what you actually did, what you actually observed, and what you concluded from your observations. *You lab report should be understood by someone who is not taking this courses. *Explain variables you introduce. Use the consistent symbols and variables throughout your lab reports including figures, tables and plots. • *Your lab report must contain the followings: • Title • Objective • Idea/Apparatus/Theory • Procedure • Result and Data analysis • Conclusion

2. Lab Reports: Details of Contents and Examples Title: Title of the lab name, Partner name, section etc Objective/Goal: One or two Sentences of Basic intent of the experiment

3. Ideas/Theory/Apparatus: Describe the main ideas or equations that will be used in the lab. You can include the circuit diagram or schematics here.

4. Ideas/Apparatus: Describe the main ideas or key equations that will be used in the lab. You can include the circuit diagram or schematics here.

5. Procedure: Summary of process you followed while carrying out the experiment.no more than ½-1 pages. Voltage divider Wheatstone Bridge Copper wire resistivity measurement

6. Result and Data Analysis: -The complete data set : Uses of table is strongly recommended - Calculation of results: Detailed numerical sample of each type with unit and conversion. - Relevant Plots (including axis label, unit, title) - If you have not reached the desirable results, explain how you troubleshoot and the result. Voltage divider

7. Result and Data Analysis Wheatstone Bridge when the bridged is “balanced” (ΔV =0) When Rx changed by 5% by adding 50 Ω, ΔRx = 50Ω, ΔVmeausred = 0.184V ΔV_calc = 0.190 V. There was 3% discrepancy. ****Add PLOTS in this section if it is needed -Check axes labels, units and title. AND fitting equation!!! Fig.4 Bode plot for high Pass filter

8. Result and Data Analysis Copper resistivity measurement Thus resistivity from DMM (ρDMM)and 4-terminal measurements (ρ4tc) is ρDMM= 1.5 μΩ cm and ρ4tc = 1.72 μΩ cm Each values has corresponding error coming from the reading of voltmeter. They are ...... These values is compared to the known value from the pre-lab 1.69μΩ cm has ***% of error.

9. Conclusion: -Summarize your results and compare them to accepted or calculated values. (if you did this in analysis section, say again in brief form!) -If you have suspicions and/or large discrepancy in your result, discuss here with reasonable quantitative estimates -You lose points by simply unsubstantiated or incorrect guess -Stick to scientific conclusions! Not opinions, no personal comments! kΩ kΩ (Bad example) ... This lab was fun and I learned a lot. It is really sad that we did not get the right result in the end.

11. Please vote for the time slot during which you are planning to attend the office hours on Monday. If you do not plan to make use of these office hours, please abstain from the vote! Monday: 9 - 10:30 10:30 – 12 12 – 1:30 1:30 – 3 3 – 4:30 Current schedule

12. Please vote for the time slot during which you are planning to attend the office hours on Wednesday. If you do not plan to make use of these office hours, please abstain from the vote! Wednesday: 9:30 - 11 11 – 12:30 12:30 – 2 2 – 3:30 5:30 – 7pm Current schedule

13. How many times have you read the lecture notes we post on the course web-page? Never 1 time 2-4 times >4 times every time

14. How many times have consulted other text books than “The Electronics Companion” (such as H&H) Never 1 time 2-3 times >3 times

15. Have you read the data sheet for the LF356? (pdf file available on web-page) Yes, and I did get something out of it Yes, but I didn’t understand it No

17. Vin =  –2 V. No load is attached to the circuit. • Vout is: • 1 V • 4V • 6 V • 7 V • None of the above

18. What is Vout? • +3 V • +4.5 V • +6 V • +9 V • None of the above

20. The open loop gain of this op-amp is 105 and the open loop bandwidth is 10 Hz. What is the bandwidth of a voltage follower made with this op-amp? • 10 kHz • 100 kHz • 1 MHz • 10 MHz • Can not be determined Vout Vin

21. The unity gain frequency of this op-amp is 5 MHz. What is the 3 db frequency of this circuit? • 50 kHz • 500 kHz • 5 MHz • 50 MHz • Can not be determined 100k 10k Vin Vout

22. I want to have a circuit with a bandwidth of at least 500 kHz and the largest possible gain. What feedback resistor should I choose ? • 1 kW • 2.5 kW • 5 kW • 10 kW • Can not be determined Rf 1k Vin Vout fT = 2.5 MHz

24. For identical positive constant Vin , rank VA–VD according to absolute value. • A > C > B > D • D > A = B > C = 0 • D > A = B = C • D > B > C > A • None of the above

25. For identical positive constant Vin , rank VA …VC according to absolute value. • A = B = C • B > A = C • B > C > A • C > B > A • None of the above

27. H1 What is the voltage at the non-inverting input, VB? A) Rf B) R V1 A Vout R V2 B C) Rf D)

28. H2 What is the voltage at the inverting input, VA? A) Rf B) R V1 A Vout R V2 B C) Rf E) D)

29. The open loop gain of this op-amp is 105 and the bandwidth is 10 Hz. What is the bandwidth of a voltage follower made with this op-amp? H4 • 10 kHz • 100 kHz • 1 MHz • 10 MHz • Can not be determined Vout Vin