# Lab report

2. Objective: Clearly state the objective of the laboratory in your own words. 3. Procedure: Provide a summary of the procedure used in the lab. Do not copy the
procedure from the lab manual. Any change in the procedure while conducting the lab to
the procedure given in the lab manual should be noted 4. Recorded Data: Whenever possible use tables and figures to provide all the recorded data.
The lab instructor may request that a student repeat the lab if any of the required data are
missing. 5. Post Lab: If post lab questions are given they must be answered in this section. These
shall be answered after the lab is over. 6. Conclusion: A brief conclusion shall be presented by the student. The conclusion should
be based on the observations and recorded data.
img_2900.jpg

sc1.png

Don't use plagiarized sources. Get Your Custom Essay on
Lab report
Just from \$13/Page

sc2.png

ee_282_lab_10_1__1_.pdf

lab_10_detailed_version_nimanthi.pdf

Unformatted Attachment Preview

EE 282  Circuit I
Lab 10
RL circuits
Name ______________________________
Concepts: In this lab we will be learning about the transient characteristics of RL
circuits.
Equipment: Oscilloscope, NI elvis system, 1 resistor, 1 inductor
The nominal (but not exact; you need to measure the actual) values of the resistors are:
R =3750 ?
?
L = 10mH?
?
Use the handheld multimeter to measure and record the actual values of the resistor.
R1 _________
Build the circuit on your breadboard and connect the elvis power supply as shown in figure
below.
3
Use the oscilloscope channel 1 and channel 2 to observe both the input and output of the
RL voltage divider. Adjust the frequency and measure the time required for the voltage
across the resistor to become 2/3 or 63.2% of the final value.
Time constant (L/R) = _______ Measured Time Constant = ________
Percent error = ___________________
Part 2: Switch the inductor and resistor in the circuit so you can measure the voltage
across the inductor. Set the function generator to 1 kHz and observe several periods of the
input square wave. How does the output voltage appear on the screen? What mathematical
operation is the circuit performing? Now zoom in on one of the spikes and measure the
time constant from the decaying exponential. Do you get the same value you got in Part 1?
Mathematical operation: ______________________
Time Constant (L/R) = ____________
Measured Time Constant = ________
Percent error = ___________________
Lab 10 detailed version
Nimanthi Nandasiri
04/11/2018
RL circuits
Equipment needed:
R1=3750O (Use decade resistor box); L= 100mH Inductor; NIELVIS oscilloscope; NIELVIS Function
generator
Part 1
1. Calculate the time constant for the circuit. For RL circuit, ???? ???????? =
?
?
To measure the time constant,
3750 ?

Use channel 0 of the Scope to measure input voltage waveform of the circuit and
channel 1 to measure output voltage (across the 3750 resistor) waveform of the
circuit.
Lab 10 detailed version
Nimanthi Nandasiri
04/11/2018
Input parameters to use in the NIELVIS function generator:



Frequency: 1000Hz
Voltage peak to peak =2V
Square waveform


Hit run
Open NIELVIS Oscilloscope and observe waveforms. (make sure to hit enabled on channel 1
settings)
Save a printout of the oscilloscope display and attach to the lab report.

If you look at the waveforms from the oscilloscope you should get waveforms similar to the
following figure.
Lab 10 detailed version
Nimanthi Nandasiri
04/11/2018
Now we need to measure the time constant. This can be done by, measuring the time required
for the voltage across the resistor to become 36.8% of the initial voltage (or 63.2% of the final
voltage)
Initial voltage should be something close to 1V, since the amplitude is 1 V.
First calculate 36.8 of initial voltage=
36.8
100
× 1? = 368??
We will move the C1 cursor to the initial voltage(~1V) and C2 cursor to the 36.8% of the
initial voltage(~368mV). Then measure the time difference (dT) between the two
cursors.
2. dT will be the measured time constant.
3. Find error %
??????? ????? =
?????????? ???? ???????? – ???????? ???? ????????
?????????? ???? ????????
Part 2
Now change the circuit so the inductor is in the resistors position and the resistor is in the inductors
position. Use the same function generator parameters. Do the same procedure as part 1.

Save a printout of the oscilloscope display and attach to the lab report.
3750 ?
Lab 10 detailed version
Nimanthi Nandasiri
04/11/2018
1. Calculate the time constant
2. Measure the time required to discharge 63.2% of the original voltage (measure time constant)
3. Find percent error

attachment

Pages (550 words)
Approximate price: -

Why Work with Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

## Calculate the price of your order

Total price:
\$0.00

How it works?

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.

## Essay Writing Service

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.