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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
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
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.
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.
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
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
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
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.
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!
k
Ω
k
Ω
(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.
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:
A) 9 - 10:30
B) 10:30 – 12
C) 12 – 1:30
D) 1:30 – 3
E) 3 – 4:30
Current schedule
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:
A) 9:30 - 11
B) 11 – 12:30
C) 12:30 – 2
D) 2 – 3:30
Current schedule
E) 5:30 – 7pm
How many times have you read the
lecture notes we post on the course
web-page?
A) Never
B) 1 time
C) 2-4 times
D) >4 times
E) every time
How many times have consulted other
text books than “The Electronics
Companion” (such as H&H)
A) Never
B) 1 time
C) 2-3 times
D) >3 times
Have you read the data sheet for the
LF356? (pdf file available on web-page)
A) Yes, and I did get something out of it
B) Yes, but I didn’t understand it
C) No
Vin = –2 V. No load is
attached to the circuit.
Vout is:
A) 1 V
B) 4 V
C) 6 V
D) 7 V
E) None of the above
17
What is Vout?
1k
+
+2 V
Vout
2k
+1 V
1k
1k
A) +3 V
B) +4.5 V
C) +6 V
D) +9 V
E) None of the above
18
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?
A)
B)
C)
D)
E)
10 kHz
100 kHz
1 MHz
10 MHz
Can not be determined
Vin
Vout
The unity gain frequency of this op-amp is 5 MHz.
What is the 3 db frequency of this circuit?
A)
B)
C)
D)
E)
50 kHz
500 kHz
5 MHz
50 MHz
Can not be determined
100k
Vin
10k
Vout
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 ?
Rf
A)
B)
C)
D)
E)
1 kW
2.5 kW
5 kW
10 kW
Can not be determined
Vin
1k
Vout
fT = 2.5 MHz
For identical positive constant
Vin , rank VA–VD according to
absolute value.
Vin
+
VA
Vin
+
VB
2k
A) A > C > B > D
Vin
+
VC
B) D > A = B > C = 0
1k
C) D > A = B = C
D) D > B > C > A
E) None of the above
Vin
+
VD
2k
1k
24
For identical positive constant Vin , rank VA …VC
according to absolute value.
Vin
10k
+
20k
5k
A)
B)
C)
D)
E)
VA
Vin
+
VB
Vin
A=B=C
B>A=C
B>C>A
C>B>A
None of the above
VC
20k
20k
5k
10k
+
5k
25
H1
A)
B)
C)
What is the voltage at the non-inverting input, VB?
R
VB 
V2
Rf
VB 
Rf
R
Rf
V2
V1
R
VB 
V2
Rf  R
D) VB 
Rf
Rf  R
V2
V2
R
A
R B
Rf
Vout
H2
What is the voltage at the inverting input, VA?
A) VA 
B)
VA 
C) VA 
Rf
V1R f  Vout R
R
V1 R f  Vout R
V1
V2
Rf
A
R B
Rf
V1 R f  Vout R
D) VA 
R
R  Rf
Rf
Rf  R
V1
E)
R
VA 
V1
Rf  R
Vout
H4
A)
B)
C)
D)
E)
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?
10 kHz
100 kHz
1 MHz
10 MHz
Can not be determined
Vin
Vout