Add Abstract, Introduction and Conclusion to the Inductors in DC Circuits Lab. Input calculationElectric Circuits Lab
Instructor: ———–
Capacitors in DC Circuits
Student Name(s): Click or tap here to enter text.
Click or tap here to enter text.
Honor Pledge:
I pledge to support the Honor System of ECPI. I will refrain from any form of academic dishonesty or deception, such as cheating or plagiarism. I am aware that as a member of the academic community, it is my responsibility to turn in all suspected violators of the honor code. I understand that any failure on my part to support the Honor System will be turned over to a Judicial Review Board for determination. I will report to the Judicial Review Board hearing if summoned.
Date: 1/1/2018
Contents
Abstract 3
Introduction 3
Procedures 3
Data Presentation & Analysis 4
Calculations 4
Required Screenshots 4
Conclusion 4
References 5
Abstract
(This instruction box is to be deleted before submission of the Lab report)
What is an Abstract?
This should include a brief description of all parts of the lab. The abstract should be complete in itself. It should summarize the entire lab; what you did, why you did it, the results, and your conclusion. Think of it as a summary to include all work done. It needs to be succinct yet detailed enough for a person to know what this report deals with in its entirety.
Objectives of Week 3 Lab 1:
· Measure the resistance and capacitance.
· Familiarize with Oscilloscope and Function generator.
· Measure the RC time constant using VR and VC.
· Understand the effect of series and parallel capacitors on RC time constant.
Introduction
(This instruction box is to be deleted before submission of the Lab report)
What is an Introduction?
In your own words, explain the reason for performing the experiment and give a concise summary of the theory involved, including any mathematical detail relevant to later discussion in the report. State the objectives of the lab as well as the overall background of the relevant topic.
Address the following items in your Introduction:
· What is the time constant for an RC circuit and what is its significance?
· How do capacitors combine in series? (Give formula)
· How do capacitors combine in parallel? (Give formula)
· What is capacitive reactance? (Give formula)
Procedures
Part I:
1.
Construct the circuit shown in
Figure 1 in Mutism.
Figure 1: Series RC Circuit
2.
Connect Channel A of the oscilloscope across the voltage source and Channel B across the capacitor.
3.
Set the function generator to
5Vpp; 100 Hz, Square Wave 50% duty cycle with 2.5 DC offset if using a function generator
. If using clock voltage, set it to 5Vpp, 100 Hz. The DC offset can be modeled by using DC mode on the oscilloscope.
4.
Observe the signals on the scope screen. See
Figure 2(a) below. (Use Electric Circuits Lab
Capacitors in DC Circuits
I.
Objectives:
After completing this lab experiment, you should be able to:
· Measure the resistance and capacitance.
· Familiarize with Oscilloscope and Function generator.
· Measure the RC time constant using VR and VC.
· Understand the effect of series and parallel capacitors on RC time constant.
II.
Parts List:
· Resistor (1) 1 kΩ
· Capacitors (2) 0.22 µF
III.
Procedures:
Part I:
1.
Construct the circuit shown in
Figure 1 in Mutism.
Figure 1: Series RC Circuit
2.
Connect Channel A of the oscilloscope across the voltage source and Channel B across the capacitor.
3.
Set the function generator to
5Vpp; 100 Hz, Square Wave 50% duty cycle with 2.5 DC offset if using a function generator
. If using clock voltage, set it to 5Vpp, 100 Hz. The DC offset can be modeled by using DC mode on the oscilloscope.
4.
Observe the signals on the scope screen. See
Figure 2(a) below. (Use Volts/Div and Time/DIV settings to adjust the signal)
Figure 2(a): Voltage across the Voltage Source and the capacitor
5.
Disable Channel A, by setting it to 0, while observing Channel B. You should be able to see the waveform as shown below. Use time base and Channel A scale to adjust the signal.
Figure 2(b): Voltage across the capacitor
6. Change the time base (Sec/Div) until you have a clear waveform on the scope as shown in
Figure 2(c).
Figure 2(c): Voltage across the capacitor
7.
Calculate the time constant of the RC circuit using the circuit parameter values.
Record the result in
Table 1 under calculated value.
= R*C
Calculated value
Measured value using VC
Measured value using VR
Time constant ()
220.049us
220.015us
Table 1: Calculated and measured values
8.
Measuring the time constant with VC:
i.
Measure the peak value of the signal, by placing one of the cursors (T1) at the peak point ___5V______.
ii.
Calculate the 63% of the above value _____3.15 V____.
iii. Place the second cursor (T2) at the step (ii) value above and T1 at zero just before the capacitor voltage starts rising as shown in
Figure 3.
iv.
Observe the value of T2-T1 on the scope, which is the one time constant, as shown below.
v.
Record the result in
Table 1 above under measured value using VC.
Figure 5: Measuring RC time constant using VC
9.
Connect Channel B of the oscilloscope across the resistor.
10. You should be able to see the waveform as shown below. (Use Volts/Div and Time/DELECTRIC CIRCUITS I
METRIC PREFIX TABLE
Metric
Prefix
Symbol
Multiplier
(Traditional Notation)
Expo-
nential
Description
Yotta
Y
1,000,000,000,000,000,000,000,000
1024
Septillion
Zetta
Z
1,000,000,000,000,000,000,000
1021
Sextillion
Exa
E
1,000,000,000,000,000,000
1018
Quintillion
Peta
P
1,000,000,000,000,000
1015
Quadrillion
Tera
T
1,000,000,000,000
1012
Trillion
Giga
G
1,000,000,000
109
Billion
Mega
M
1,000,000
106
Million
kilo
k
1,000
103
Thousand
hecto
h
100
102
Hundred
deca
da
10
101
Ten
Base
b
1
100
One
deci
d
1/10
10-1
Tenth
centi
c
1/100
10-2
Hundredth
milli
m
1/1,000
10-3
Thousandth
micro
µ
1/1,000,000
10-6
Millionth
nano
n
1/1,000,000,000
10-9
Billionth
pico
p
1/1,000,000,000,000
10-12
Trillionth
femto
f
1/1,000,000,000,000,000
10-15
Quadrillionth
atto
a
1/1,000,000,000,000,000,000
10-18
Quintillionth
zepto
z
1/1,000,000,000,000,000,000,000
10-21
Sextillionth
yocto
y
1/1,000,000,000,000,000,000,000,000
10-24
Septillionth
4-BAND RESISTOR COLOR CODE TABLE
BAND
COLOR
DIGIT
Band 1: 1st Digit
Band 2: 2nd Digit
Band 3: Multiplier
(# of zeros
following 2nd digit)
Black
0
Brown
1
Red
2
Orange
3
Yellow
4
Green
5
Blue
6
Violet
7
Gray
8
White
9
Band 4: Tolerance
Gold
± 5%
SILVER
± 10%
5-BAND RESISTOR COLOR CODE TABLE
BAND
COLOR
DIGIT
Band 1: 1st Digit
Band 2: 2nd Digit
Band 3: 3rd Digit
Band 4: Multiplier
(# of zeros
following 3rd digit)
Black
0
Brown
1
Red
2
Orange
3
Yellow
4
Green
5
Blue
6
Violet
7
Gray
8
White
9
Gold
0.1
SILVER
0.01
Band 5: Tolerance
Gold
± 5%
SILVER
± 10%
EET Formulas & Tables Sheet
Page
1 of
21
UNIT 1: FUNDAMENTAL CIRCUITS
CHARGE
Where:
Q = Charge in Coulombs (C)
Note:
1 C = Total charge possessed by 6.25×1018 electrons
VOLTAGE
Where:
V = Voltage in Volts (V)
W = Energy in Joules (J)
Q = Charge in Coulombs (C)
CURRENT
Where:
I = Current in Amperes (A)
Q = Charge in Coulombs (C)
t = Time in seconds (s)
OHM’S LAW
Where:
I = Current in Amperes (A)
V = Voltage in Volts (V)
R = Resistance in Ohms (Ω)
RESISTIVITY
Where:
ρ = Resistivity in Circular Mil – Ohm per Foot (CM-Ω/ft)
A = Cross-sectional area in Circular Mils (CM)
R = Resistance in Ohms (Ω)
ɭ = Length in Feet (ft)
Note:
CM: Area of a wire with a 0.001 inch (1 mil) diameter
CONDUCTANCE
Where:
G = Conductance in Siemens (S)
R
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