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ECT 125 Week 1 Homework Help | Assignment Help |
Devry University
Complete and submit the following chapter problems:
·
Chapter 10:
Pages 309–310, Problems 2, 4, 6, 8, and 10
·
·
Chapter 12:
Pages 373–374, Problems 2, 4, 6, 8, and 10
·
·
Chapter 16:
Pages 515–516, Problems 2, 4, 6, 8, 10, 12, 14, and 16
ECT 125 Week 1 Discussion 1 | Assignment Help |
Devry University
Week 1 Discussion
Week 1: Inductors
Show the formula
for finding the the total inductance for a series circuit with three inductors.
Solve for the total
inductance, LT, where L1=12mH, L2=67mH and L3=9mH.
No cheating and
looking at others to learn.
Once the
answer is confirmed, move on the next
question or ask your question to get everyone to understand.
ECT
125 Week 1 Lab Assignment Help | Devry University
Week 1 Lab: Capacitor
and Inductors Properties and Functions (30 Points)
This lab will be done
in three distinctive parts as follows:
Part I entails opening
a circuit file, interacting with the circuit, and then answering questions
about the observed circuit function.
Part II entails
calculating the theoretical values of capacitors in series and parallel
configurations, arranging the capacitors and measuring actual values, and then
answering questions about the observed capacitor values.
Part III entails
building a RC circuit, calculating and observing circuit values in regard to
time constants, and then answering questions about the observed circuit
function.
All parts of the lab
can be accomplished in Multi Sim. (Include screen shot of each measurement or
per requirements in the Announcements)
ECT
125 Week 2 Discussion 1 | Assignment Help | Devry University
Week 2: Right Triangles
and Series AC Circuits
Class, This the opening
discussion question. Please revisit this discussion topic throughout the week
and attempt each new question, hopefully until you get it correct so you will
master the technique to solve them.
Explain why we use the
polar and rectangular notations.
When using basic math
operations (i.e., addition, subtraction, multiplication, division), what
notation is easier to use
ECT
125 Week 2 Homework Help | Devry University
Complete and submit the
following chapter problems.
Chapter 9: Pages
270–272, Problems 2, 4, 6, 16, and 18
Chapter 10: Page 312,
Problems 18, 20, and 22
Chapter 11: Pages
347–348, Problems 2, 4, 6, and 8
Chapter 12: Pages
373–374, Problems 12, 14, 16, 18, and 20
Chapter 13: Pages
407–408, Problems 2, 4, and 6
Chapter 14: Pages
443–446, Problems 2, 4, 6, 8, 10, 20, 22, 24, and 26
ECT
125 Week 2 Lab Assignment Help | Devry University
Download the Week 2 Lab
instructions located in course Files>Labs
This lab will be done
in three distinctive parts as follows:
Part I entails angle
properties and the use of a protractor to measure angles, make observations,
and answer questions.
Part II entails
constructing triangles, measuring properties of the triangles, recording
results, and utilizing the Pythagorean Theorem to find unknown properties.
Part III entails the
use of protractor and a ruler to construct triangles and utilizing the
Pythagorean Theorem and trigonometric identities to calculate properties.
All parts of the lab
can be accomplished on a sheet of paper.
ECT Week 3 Discussion 1 | Assignment Help | Devry
University
Week 3: AC Power
Calculations
Class, This the opening
discussion question. Please revisit this discussion topic throughout the week
and attempt each new question, hopefully until to get it correct so you will
master the technique to solve them.
RL Series Power -
Question 1
Using Figure 11.14 with
the following values, determine PX, PR,
PAPP and Ө (Draw the Power triangle)
Vs = 33V
ƒ = 100kHz
L = 40µH
R = 50Ω
Look for new questions
and move on once you have this one down.
ECT
125 Week 3 Discussion 2 | Assignment Help | Devry University
Week 3: Capacitive and
Inductive Reactance (Group answer)
Class, This the opening
discussion question. Please revisit this discussion topic throughout the week
and attempt each new question, hopefully until to get it correct so you will
master the technique to solve them.
RC Series Power Circuit
- Question 1
Using Figure 13.14 with
the following values, determine PX, PR,
PAPP and Ө (Draw the Power triangle)
Vs = 85mV
ƒ = 100Hz
C = 47µF
R = 47Ω
ECT
125 Week 3 Lab Assignment 1 | Devry University
Amplitude Measurement
1. Construct the circuit shown.
2. Set the function generation to provide
a 0.25 V RMS amplitude sine wave. Measure
the amplitude of the wave with the DMM and oscilloscope. Record your measurements in Table 1.0
Table 1 Voltage
Measurements
Function
Generator DMM Oscilloscope
0.25 V
0.5 V
0.75 V
1 V
3. Repeat your measurements for each of
the amplitudes on the function generator.
Which format does the
digital multimeter measure ac voltages in?
Which format does the
oscilloscope measure ac voltages in?
4. Return the amplitude back to 1 VRMS
and change the frequency of the function generator to 5 kHz and measure the
voltage with the DMM and oscilloscope.
Does changing the
frequency change any of the amplitude measurements?
5. Change the function generator to
produce a 1 VRMS square wave at 1 kHz.
Measure the voltage amplitude with the DMM and oscilloscope.
Are the measurements
the same for sine and square waves?
Part II: Time
Measurement
1. Construct the circuit shown.
2. Set the function generation to provide
a 1 Vpeak amplitude sine wave at 1 kHz.
Measure the period of the waveform on the oscilloscope. Record your measurements in Table 1.0
Table 1 Period
Measurements
Function
Generator Period 1/period
500 Hz
1 kHz
2 kHz
5 kHz
10 kHz
15 kHz
20 kHz
25 kHz
3. Repeat your measurements for each of
the frequencies in the table.
4. Calculate the measured frequency by
taking the inverse of the measured period and complete table 1.
Do the function
generator values and the measured frequency values correspond?
How would you measure
the frequency with a DMM?
ECT
125 Week 3 Lab Assignment 2 | Devry University
Part I:Phase Shift
Measurement
1. Construct the circuit shown.
2. Set the function generation to provide
a 1 VRMS amplitude sine wave at 500 Hz.
Measure the inductor voltage and the phase shift between the source and
inductor voltage.
Table 1 Phase
Measurements
Function
Generator Inductor Voltage (V) Phase Shift
Degrees
500 Hz
1 kHz
5 kHz
10 kHz
15 kHz
20 kHz
25 kHz
3. Repeat your measurements for each of
the frequencies in table 1.
4. In order to find the inductor current
phase we would need a device that measures current versus time. Fortunately, we know that the phase
difference between the voltage and current in a resistor is 0o. So for the series inductor and resistor if we
measure the resistor voltage phase it will have the same phase as the inductor
(and total) current. Reverse the
positions of the resistor and inductor and measure the phase shift between the
source and the resistor voltage.
Table 2 Phase
Measurements
Function
Generator Inductor Voltage Phase Shift
Degrees Current Phase Shift
Degrees Phase Difference Degrees
500 Hz
1 kHz
5 kHz
10 kHz
15 kHz
20 kHz
25 kHz
What is the phase
difference between the inductor voltage and current?
Does this phase
difference change with frequency?
Which the voltage or
current leads (is ahead) of the other?
Does this correspond with theory?
Part II: Time and
Voltage Measurement
1. Construct the
circuit shown
2. Set the function generation to provide
a 1 VRMS amplitude sine wave at 200 Hz.
Measure the inductor voltage and the phase shift between the source and
inductor voltage. Note whether the phase
shift is ahead of or behind the source.
Table 1 Period
Measurements
Function
Generator Inductor Voltage (V) Phase Shift
Degrees
200 Hz
500 Hz
1 kHz
5 kHz
10 kHz
15 kHz
20 kHz
25 kHz
3. Repeat your measurements for each of
the frequencies in table 1.
4. Reverse the positions of the resistor
and inductor and measure the resistor voltage and phase shift between the
source and the resistor voltage. Note
whether the phase shift is ahead of or behind the source.
Table 2 Resistor
Voltage Measurements
Function
Generator Resistor Voltage Phase Shift
Degrees
200 Hz
500 Hz
1 kHz
5 kHz
10 kHz
15 kHz
20 kHz
25 kHz
5. Fill in the voltages in polar form
from tables 1 and 2 into table 3. Add
the inductor and resistor voltages, remember to change to rectangular form to
add then convert to polar form for final answer.
Table 3 Voltage
Measurements
Function
Generator Inductor Voltage Resistor Voltage Total
Voltage
200 Hz
500 Hz
1 kHz
5 kHz
10 kHz
15 kHz
20 kHz
25 kHz
According to KVL the
sum of the voltages should equal the source voltage. Is that the case in this situation?
ECT
125 Week 3 Lab Assignment 3 | Devry
University
Part I:Phase Shift
Measurement
1. Construct the circuit shown.
2. Set the function generator to
provide a 1 VRMS amplitude sine wave at 5 kHz.
Measure the capacitor voltage and the phase shift between the source and
capacitor voltage. Remember to adjust
the amplitude to 1 VRMS for each measurement.
Table 1 Period
Measurements
Function
Generator Capacitor Voltage (V) Phase Shift
Degrees
200 Hz
500 Hz
1 kHz
5 kHz
10 kHz
15 kHz
20 kHz
25 kHz
40 kHz
In order to find the
capacitor current phase we would need a device that measures current versus
time. Fortunately, we know that the
phase difference between the voltage and current in a resistor is 0o. So for the series capacitor and resistor if
we measure the resistor voltage phase it will have the same phase as the
capacitor (and total) current. Reverse
the positions of the resistor and capacitor and measure the phase shift between
the source and the resistor voltage.
Remember to adjust the amplitude to 1 VRMS for each measurement.
3. Repeat your measurements for each
of the frequencies in table 1.
Table 2 Phase
Measurements
Function
Generator Capacitor Voltage Phase Shift
Degrees Current Phase Shift
Degrees Phase Difference Degrees
200 Hz
500 Hz
1 kHz
5 kHz
10 kHz
15 kHz
20 kHz
25 kHz
40 kHz
What is the phase
difference between the capacitor voltage and current?
Does this phase
difference change with frequency?
Which the voltage or
current leads (is ahead) of the other?
Does this correspond
with theory?
Part II: Phaseand
Voltage Measurement
1. Construct the circuit shown.
2. Set the function generation to provide a 1
VRMS amplitude sine wave at 5 kHz.
Measure the resistor voltage and the phase shift
between the source and resistor voltages. Remember to keep track of which voltage leads
or lags the other. Use the source as
your reference.
Table 1 Voltage
Measurements
Function
Generator Resistor
Voltage (V) Phase Shift
Degrees Capacitor Voltage (V) Phase Shift
Degrees Inductor Voltage (V) Phase Shift
Degrees
500 Hz
1 kHz
5 kHz
10 kHz
15 kHz
20 kHz
25 kHz
30 kHz
35 kHz
3. Repeat your measurements for each of the
frequencies in table 1.
4. Rearrange the circuit and repeat
your measurements for each of the series components, resistor, inductor and
capacitor in table 1.
5. Determine the total series voltage
by adding the voltages for each frequency in table 1.
Table 2 Voltage
Measurements
Function
Generator Total
Voltage (V)
500 Hz
1 kHz
5 kHz
10 kHz
15 kHz
20 kHz
25 kHz
30 kHz
35 kHz
Does KVL still apply to
RLC series circuits? Explain.
What is the phase
difference between the inductor and capacitor voltages? It this what you expected? Why or why not?
6. Determine the total impedance and
phase angle of the series circuit for each of the frequencies. Remember to adjust the amplitude to 1 VRMS
for each measurement.
Table 3 Phase
Measurements
Function
Generator Measured
Resistor Phase Calculated XL Calculated XC Calculated
Impedance phase
500 Hz
1 kHz
5 kHz
10 kHz
15 kHz
20 kHz
25 kHz
30 kHz
35 kHz
Is the impedance phase
angle the same as that of the resistor voltage?
What is the
relationship between the two angles?
ECT
125 Week 4 Discussion 1 | Assignment Help | Devry University
Week 4: Parallel AC
Circuits
Class, This the opening
discussion question. Please revisit this discussion topic throughout the week
and attempt each new question, hopefully until you get it correct so you will
master the technique to solve them.
We will have RLC series
and parallel circuits on this weeks Quiz.
You have seen the
series RLC circuits in Lesson and Live Lecture last week.
You will see parallel
RLC circuits in Lesson and Live Lecture this week.
Please review these
very carefully and also read section 14.4 in the textbook.
In this threaded
discussion, this week, I will be presenting questions on RLC series and parallel circuits to prepare
you for the Quiz.
Please participate
early and often and we can get through more examples.
Week 4 - Question 1
Do Practice Problem
14-20 (show work and phasor diagram)
ECT
125 Week 4 Discussion 2 | Assignment Help | Devry University
Class, This the opening
discussion question. Please revisit this discussion topic throughout the week
and attempt each new question, hopefully until to get it correct so you will
master the technique to solve them.
Class - Like ECT122,
this class now shifts from series circuits to parallel circuits this week.
From ECT122 we remember
that for a simple series circuit, there is one current through all components
(IT) and one or more voltage drops around the loop.
From ECT122 we remember
that for a simple parallel circuit, there is one voltage across all components
(Vs) and two or more current branches.
In ECT122 we introduced
conductance, G, which is the reciprocal of resistance R. GT = 1/RT
or G1=1/R1
Now we introduce
Admittance and Susceptance
Explain how you find
the total impedance Z of the parallel circuit using Admittance, Conductance
and/or Susceptance?
ECT
125 Week 4 Discussion | Assignment Help | Devry University
Week 4: Parallel AC
Circuits
How does a Parallel RLC
(AC) circuit work? Provide an example of a practical application in the
electronics field.
ECT
125 Week 4 Quiz | Assignment Help | Devry University
Question 1
(TCO 4) Find the
apparent power (PAPP) if the resistive power is 70.7 watts and the reactive
power is 70.7 VAR.
Question 2
(TCO 2, 3) A series RC
circuit consists of a 50 Ω resistor and a 500 Ω capacitor. What is the
magnitude of the total impedance?
Question 3
(TCO 2, 3) A series RL
circuit consists of a 50 Ω resistor and a 500 Ω inductor. What is the angle of
impedance?
Question 4
(TCO 3) Calculate
current values IL and IC for the circuit shown below.
ECT 125 Week 4 Lab Assignment 1 | Devry
University
Part I:Power
Ratings
Step 1: Power
Rating Observation and Notation
1. Utilize
Google to find test equipment power ratings. Complete the table for
the test equipment listed below.
Table 1 Power Ratings
Equipment
|
Power rating
|
Oscilloscope
|
|
Computer
|
|
Monitor
|
|
Lamp
|
|
ECT
125 Week 4 Lab Assignment 2 | Devry University
Part I:Current in RL
Circuits
Step 1: Circuit
Analysis and Construction
1. Place a 220 W resistor in parallel
with a 1 V sine wave ac supply oscillating at 10 kHz.
2. Use a multimeter to measure the
current through the resistor.
IR = _______________
3. Replace the resistor with the 10
mH inductor and measure the current.
IL = _______________
4. Now estimate the total current
through the parallel combination of the resistor and inductor.
IT estimate = _______________
5. Construct the parallel circuit and
measure the total current and compare to your estimate.
IT measured = _______________
6. Calculate the total impedance for
the parallel circuit and then the total current and compare the theoretical and
measured values.
7. Double the supply frequency to 20
kHz and confirm your answer.
Part II: Current in RC
Circuits
Step 1: Circuit
Analysis and Construction
1. Place a 220 W resistor in parallel
with a 1 V sine wave ac supply oscillating at 10 kHz.
2. Use a multimeter to measure the
current through the resistor.
IR = _______________
3. Replace the resistor with a 100 nF
capacitor and measure the current.
IC = ______________
4. Now estimate the total current
through the parallel combination of the resistor and capacitor.
IT estimate = _______________
5. Construct the parallel circuit and
measure the total current and compare to your estimate.
IT measured = _______________
6. Calculate the total impedance for
the parallel circuit and then the total currentand compare the theoretical and
measured values.
ECT
125 Week 4 Lab Assignment 3 | Devry University
Step 1: Circuit Analysis and Construction
1. Construct
the series-parallel circuit shown.
2. Determine
the total circuit impedance (including phase) for the circuit.
ZT= ____________
3. Determine
the total circuit current (including phase) and then use the current divider
rule to determine IR, IC,
and IL for the circuit.
IT= ____________ IR = ____________ IC = ____________
IL = ____________
4. Use
the calculated IR to determine the power dissipated
by the resistor.
PR =
_______________
5. Now
simulate the circuit and measure the component and total currents.
IT
simulated = ____________, IR
simulated = ____________, IC
simulated = ____________,
IL
simulated = ____________
6. Now
prototype the circuit on your breadboard and use the function generator as the
source. Measure the component and total currents.
IT
measured = ____________, IR
measured = ____________, IC
measured = ____________,
IL
measured = ____________
Did the current
measurements correspond to theory? Why or why not?
ECT
125 Week 5 Discussion | Assignment Help | Devry University
Week 5: Series/Parallel
AC Circuits
What approach would you
use to analyze a series/parallel AC circuit? How would you determine the
magnitude and phase relationships for the voltages, currents, and powers in the
circuit?
ECT 125 Week 5 Lab Assignment 1 | Devry
University
Part I:Inductor in Series with Parallel Combination
of Capacitor and Resistor
1. Construct the
series-parallel circuit shown.
2. Determine the
total circuit impedance (including phase) for the circuit.
To do this you
must first determine the capacitive reactance then find Zparallel consisting
of the resistor and capacitor in parallel. Next you must add the
inductive reactance.
ZT = ____________
3. Determine the
total circuit current (including phase) for the circuit.
IT = ____________
4. Use the current
divider rule to determine the resistor and capacitor currents.
IR = ____________
IC = ____________
What will the
inductor current be?
IL = ____________
5. Apply KCL to the
branch currents. Does the sum of the branch currents equal to the total
current?
6. Now measure the
component currents.
IR
measured = ____________
IC
measured = ____________
IL
measured = ____________
Did the current
measurements correspond to theory?
Which circuit
rule or law can we now use to find the component voltages?
7. Use it to find
the component voltages.
VR =
____________
VC =
____________
VL =
____________
Apply KVL to
one of the circuit loops and check that the sum of the voltage drops is equal
to the supply voltage.
8. Now measure the
component voltages
VR
measured = ____________
VC
measured = ____________
VL
measured = ____________
Did the voltage
measurements correspond to theory?
Part II:
Resistor in Series with Parallel Combination of Capacitor and Inductor
1. Construct the
series-parallel circuit shown.
2. Determine the
total circuit impedance (including phase) for the circuit.
To do this you
must first determine the inductive and capacitive reactance then find Zparallel consisting
of the inductor and capacitor in parallel. Next you must add the
resistance
ZT = ____________
3. Determine the
total circuit current (including phase) for the circuit.
IT = ____________
4. Use the current
divider rule to determine the inductor and capacitor currents.
IL = ____________
IC = ____________
What will the
resistor current be?
IR = ____________
5. Apply KCL to the
branch currents. Does the sum of the branch currents equal the total
current?
6. Now measure the
component currents.
IR
measured = ____________
IC
measured = ____________
IL
measured = ____________
Did the current
measurements correspond to theory?
Which circuit
rule or law can we now use to find the component voltages?
7. Use it to find
the component voltages.
VR = ____________
VC = ____________
VL = ____________
Apply KVL to
one of the circuit loops and check that the sum of the voltage drops is equal
to the supply voltage.
8. Now measure the
component voltages.
VR
measured = ____________
VC
measured = ____________
VL
measured = ____________
Did the voltage
measurements correspond to theory?
ECT 125 Week 5 Lab Assignment 2 | Devry
University
Part I:Capacitor in Series with Parallel Combination
of Inductor and Resistor
1. Construct the series-parallel circuit
shown.
2. Determine the total circuit impedance
(including phase) for the circuit.
To do this you
must first determine the inductive and capacitive reactance then find Zparallel consisting
of the inductor and resistor in parallel. Next you must add the
capacitive reactance.
ZT = _______________
3. Determine the total circuit current
(including phase) for the circuit.
IT = _______________
4. Use the current divider rule to
determine the inductor and resistor currents.
IL = _______________
IR = _______________
What will the
capacitor current be?
IC = _______________
5. Apply KCL to the branch currents, do the
sum of the branch currents equal to the total current.
6. Now measure the component currents.
IR
measured = ______________ IC
measured = ______________ IL
measured = ______________
Did the current
measurements correspond to theory?
Which circuit
rule or law can we now use to find the component voltages?
7. Use it to find the component voltages?
VR =
_______________
VC =
_______________
VL =
_______________
Apply KVL to
one of the circuit loops and check that the sum of the voltage drops is equal
to the supply voltage.
8. Now measure the component voltages.
VR
measured = ______________VC measured =
______________VL measured = ______________
Did the voltage
measurements correspond to theory?
9. Determine the component powers and total
power.
PR =
_______________
PC =
_______________
PL =
_______________
PT =
_______________
10. Does the last calculation match the
product of the supply voltage and total current? Why should it or should
it not match?
Part II:
Inductor in Series with Parallel Combination of Capacitor and Resistor
1. Construct
the series-parallel circuit shown.
2. Determine
the total circuit impedance (including phase) for the circuit.
To do this you
must first determine the inductive and capacitive reactance then find Zparallel consisting
of the resistor and capacitor in parallel. Next you must add the
resistance
Zparallel =
_______________
ZT = _______________
3. Determine
the total circuit current (including phase) for the circuit.
IT = _______________
4. Use
the current divider rule to determine the resistor and capacitor currents.
IR = _______________
IC = _______________
What will the
inductor current be?
IL = _______________
5. Apply
KCL to the branch currents. Does the sum of the branch currents equal the
total current?
6. Now
measure the component currents.
IR
measured = _______________
IC
measured = _______________
IL
measured = _______________
Did the current
measurements correspond to theory?
Which circuit
rule or law can we now use to find the component voltages?
7. Use
it to find the component voltages.
VR =
_______________
VC =
_______________
VL =
_______________
Apply KVL to
one of the circuit loops and check that the sum of the voltage drops is equal
to the supply voltage.
8. Now
measure the component voltages.
VR
measured = _______________
VC
measured = _______________
VL
measured = _______________
Did the voltage
measurements correspond to theory?
ECT 125 Week 5 Lab Assignment 3 | Devry
University
Exercise:Resistor
and Inductor in Series With Parallel Combination of Capacitor and Resistor
1. Construct the
series-parallel circuit shown.
2. Determine the total circuit
impedance (including phase) for the circuit.
To do this you
must first determine Zparallel consisting of the
resistor 2 and capacitor in parallel. Next you must add the resistance and
inductive reactance.
Zparallel = ______________
ZT = ______________
3. Determine the total circuit
current (including phase) for the circuit.
IT = ______________
4. Use the current divider rule
to determine the resistor R2 and capacitor currents.
IR2 = ______________
IC = ______________
What will the
resistor R1 current be?
IR1 = ______________
5. Apply KCL to the branch
currents.Does the sum of the branch currents equal the total current?
6. Now measure the component
currents.
IR1
measured =______________ IR2
measured =______________
IC
measured =______________ IL
measured =______________
Did the current
measurements correspond to theory?
Which circuit
rule or law can we now use to find the component voltages?
7. Use it to find the component
voltages.
VR1 =______________
VR2 =______________
VC =______________
VL =______________
Apply KVL to
one of the circuit loops, and check that the sum of the voltage drops is equal
to the supply voltage.
8. Now measure the component
voltages.
VR1
measured =______________ VR2
measured =______________
VC measured =______________ VL
measured =______________
Did the voltage
measurements correspond to theory?
ECT 125 Week 6
Discussion | Assignment Help | Devry University
Week 6: Logarithm and Filters
How do you design a band-pass filter
by using a low-pass and high-pass filter combination?
ECT 125 Week 6 Quiz | Assignment Help | Devry
University
Question 1
(TCO 7) Voltage gain of an audio amplifier uses the
following formula. If the input signal is 3 mV and the output signal level is 3
volts, find the voltage gain.
Question 2
(TCO 6) A series RCL circuit consists of a 500 Ω
resistor, 50 Ω capacitor, and a 50 Ω inductor. What is the magnitude of
the total impedance?
Question 3
(TCO 8) A filter that rejects low frequency
components of a signal is a _____.
Question 4
(TCO 6) Calculate the IL, IR, in polar notation,
for the following circuit.
ECT 125 Week 6 Lab Assignment 1 | Devry University
Part I:Logarithms
1. Determine the logarithms of the
following numbers.
a. Log(302) = ________________
b. Log(2) = _________________
c. Log(501) = _________________
d. Log(.333) = _________________
e. Log(3) = _________________
f. Log(1) = _________________
g. Log(67972) = _________________
h. Log(.36722) = _________________
i. Log(.00001) = _________________
j. Log(2.788) = _________________
2. Determine the logarithms of the
following numbers by adding the logs of each number.
a. Log(302 x 503) = _________________
b. Log(12 x 37) = _________________
c. Log(5 x 389) = _________________
d. Log(.333 x .227) = _________________
3. Determine the logarithms of the
following numbers by subtracting the logs of each number.
a. Log(302/503) = _________________
b. Log(12/37) = _________________
c. Log(5/ 389) = _________________
d. Log(.333 / .227) = _________________
4. Determine the logarithms to the base 2
of the following.
a. Log2(302) = _________________
b. Log2(.4) = _________________
c. Log2(19) = _________________
d. Log2(.25) = _________________
5. Determine the logarithms to the
natural base of the following.
a. Ln(302) = _________________
b. Ln(2.8) = _________________
c. Ln(.334) = _________________
d. Ln(3903) = _________________
Part II: Gain in dB
1. Determine the gains of the following
systems in decibels.
a. Pin = 20 mW, Pout = 2.1 mW Gain = _________________dB
b. Pin = 6 nW, Pout = 200 mW Gain = _________________dB
c. Pin = 15 mW, Pout = 25.4 W Gain = _________________dB
d. Pin = 20 W, Pout = 6.3 mW Gain = _________________dB
e. Pin = 20 pW, Pout = 6.3 mW Gain = _________________dB
2. Determine the value of the following
powers in dBW.
a. P = 2.4 W = _________________dBW
b. P = 209 W = _________________dBW
c. P = 15 mW = _________________dBW
d. P = 512 W = _________________dBW
e. P = 7 W = _________________dBW
3. Determine the value of the following
powers in dBm.
a. P = 2.4 W = _________________dBm
b. P = 13 mW = _________________dBm
c. P = 2.4 mW = _________________dBm
d. P = 16.3 nW = _________________dBm
e. P = 1 pW = _________________dBm
ECT 125 Week 6 Lab Assignment 2 | Devry University
Part I:RC Low and
High Pass Filters
1. Construct the circuit shown.
2. Vary the frequency from minimum to
maximum frequencies and observe the input and output wave forms on the
oscilloscope. What happened to the phase
of the capacitor voltage when the frequency was changed?The phase increases as
the frequency is increased.
3. Vary the frequency from minimum to
maximum frequencies and observe the input and output wave forms on the
oscilloscope. What happened to the phase
of the capacitor voltage when the frequency was changed?The phase increases as
the frequency is increased.
Table 1 Voltage and
Phase Measurements
f Vout (V) Phase
(degrees)
100 Hz
200 Hz
500 Hz
1 kHz
2 kHz
5 kHz
10 kHz
20 kHz
30 kHz
4. Plot the output voltage versus
frequency using Excel. Based on your
measurements, which type of filter is this circuit?
5. Estimate from your results, the
cut-off frequency of this filter.
fcut-off = _____
6. Now adjust the frequency until the
output voltage is 0.707 of the input voltage and measure the cut-off frequency.
fcut-off = _____
What should the cut-off frequency be
according to theory?
What is the
relationship between the cut-off frequency and the time constant?
7. Reverse the position of the
capacitor and resistor and repeat the measurements.
Table 2 Voltage and
Phase Measurements
f Vout (V) Phase
(degrees)
100 Hz
200 Hz
500 Hz
1 kHz
2 kHz
5 kHz
10 kHz
20 kHz
30 kHz
8. Plot the output voltage versus
frequency for this set of data. Which
type of filter is this circuit?
What do you think the cut-off
frequency will be for the second circuit?
Part II: RL Low and
High Pass Filters
1. Construct the circuit shown.
2. Use the techniques described in the
lecture to predict which type of filter the circuit above will be.
3. Measure the output voltage and phase for
each of the frequencies shown below
Table 1 Voltage and
Phase Measurements
f Vout (V) Phase
(degrees)
100 Hz
200 Hz
500 Hz
1 kHz
2 kHz
5 kHz
10 kHz
20 kHz
30 kHz
4. Plot the output voltage versus frequency
using Excel. Do the measured values correspond
to those predicted in procedure 2?
5. Calculate the cut-off frequency.
fcut-off Theory =
______
6. Now adjust the frequency until the
output voltage is 0.707 of the input voltage and measure the cut-off frequency.
fcut-off measured =
______
Do the theoretical
and measured values correspond?
What is the
relationship between the cut-off frequency and the time constant?
7. Reverse the position of the
inductor and resistor in the circuit.
8. If using ELVIS, plot the output
voltage versus frequency using the Bode plotter utility. Use the same frequency range as in the first
part. Which type of filter is this
circuit? High-pass filter
Calculate the
cut-off frequency for the second circuit?
fcut-off Theory =
____
Did this correspond
with the Bode plot results?
Is this cut-off
frequency the same as in the first part?
Why or Why not?
·
ECT 125 Week 6 Lab
Assignment Help 3 | Devry University
- Part I: Bandpass or Notch?
- 1. Construct the circuit shown.
·
·
2. Use
the techniques described in the lecture to predict which type of filter the
circuit above will be
·
3. Determine
the filter center frequency, circuit Q and bandwidth.
·
·
fcenter =
__
· Q = __________
·
BW = _____
4. From
the above results predict the upper and lower cut-off frequencies.
·
·
flower =
_____
· fupper =
________
- Part II: Bandpass or Notch?
·
1. Construct
the circuit shown.
·
·
·
2. Use
the techniques described in the lecture to predict which type of filter the
circuit above will be.
·
3. Determine
the filter center frequency, circuit Q and bandwidth.
·
fcenter =
______
·
Q = ___________
·
BW = _______
4. From
the above results predict the upper and lower cut-off frequencies.
·
flower =
____
·
fupper =
____
ECT 125 Week 7 Discussion | Assignment Help | Devry
University
Week 7: Filter
Applications and Transformers
Explain the
application of a power transformer, and provide a practical example in
electronics. Can we use a transformer in a DC circuit to increase or decrease
the voltages?
ECT 125 Week 7 Assignment Help | Devry University
How does a Series
RLC (AC) circuit works? Provide an example of a practical application in the
electronics field.
How does a Parallel
RLC (AC) circuit works? Provide an example of a practical application in the
electronics field.
What approach would
you use to analyze a series/parallel AC circuit? How would you determine the
magnitude and phase relationships for the voltages, currents, and powers in the
circuit? Provide an example
Explain a
step-by-step method for the design of a band-pass filter by using a low-pass
and high-pass filter combination.
How is bandwidth
defined, and why it is so important in the electronic communications? In
sending voice, video, and data files over the Internet, which application
requires the higher bandwidth? Why?
Explain the
application of a power transformer, and provide an practical example in
electronics. Can we use a transformer in a DC circuit to increase or decrease
the voltages? Finally, what are the differences between a power and a matching
transformer?
You are not limited
to the list of projects above. Please refer all questions concerning what is
acceptable as a class project to your instructor. Furthermore, the professor
will have the opportunity to introduce other topics if he so desires.
ECT 125 Week 7 Lab Assignment 1 | Devry
University
Step-Down Transformer Circuits
1. Construct the circuit shown.
2. Given
the transformer turns ratio as 8.5 calculate the
expected secondary and primary voltage and currents.
Vsecondary
theory =
_________________ Isecondary
theory = _________________
I primary
theory = _________________ V primary
theory = _________________
3. Download
Week 7-Activity1a Multisim file from this week’s Doc Sharing. Change the
transformer turns ratio to match that of your transformer if necessary. Measure
the following:
Vsecondary
simualted = _______________ Isecondary
simulated = _________________
I primary
simulated = _______________ V primary
simulated = _________________
4. Measure
the transformer secondary voltage and current.The ‘P’ side represents the
primary side in the step down configuration. So the ‘P’ side will be connected
to the source. You will want to connect your circuit and verify your source
voltage on the oscilloscope. Get the amplitude and frequency as close as you
can to the indicated values and ensure that your mean voltage (DC offset) is
minimized (as close to zero as possible).
Vsecondary =
_________________ Isecondary = _________________
5. Measure
the primary voltage and current.
I primary = _________________ V primary =
_________________
Did the
measured values correspond with the theoretical ones?
6. Replace
the load resistor with one that has a resistance of 47 W and repeat
procedures 2 through 4. You will need to reset the input voltage using the
oscilloscope.
7. Calculate
the expected secondary and primary voltage and currents for this load.
Vsecondary
theory =
_________________
Isecondary theory = _________________
I primary
theory =
_________________
V primary theory = _________________
8. Measure
the transformer secondary voltage and current.
Vsecondary =
_________________
Isecondary = _________________
9. Measure
the primary voltage and current.
I primary =
_________________
V primary = _________________
Did the
measured values correspond with the theoretical ones?
What would
happen if the input frequency were doubled?
Try it and see.
ECT 125 Week 7 Lab Assignment 2 | Devry
University
Step-Up Transformer Circuits
1. Construct
the circuit shown below on the breadboard. Note that you will turn around the
transformer so the ‘P’ is on the secondary side.
2. Given
the transformer turns ratio from the previous iLab, calculate the expected
secondary and primary voltage and currents.
Vsecondary
theory =________________ Isecondary
theory = _______________
I primary
theory = ________________ V primary
theory = _________________
3. Change
the circuit in the Week 7-Activity1a Multisim file from this week’s
Doc Sharing to match the circuit above. You don’t need to flip the transformer
horizontally. Just double-click the transformer and change the turns ratio as
indicated. Measure the following:
Vsecondary
simualted = ________________ Isecondary
simulated = ________________
I primary
simulated = ________________ V primary
simulated = ________________
4. The
next step is to build the circuit. Because of circuit loading, you will need to
put in approximately 2.6 Vrms to yield the desired 0.25 VRMS on
the primary side. Make sure you swap the transformer so that the ‘P’ is on the
secondary side. Measure the transformer primary and secondary voltages and
currents.
Vsecondary =
________________ Isecondary =
________________
I primary =
________________ V primary =
________________
Did the
simulated and measured values correspond with the theoretical ones?
5. Given
the transformer turns ratio from the previous iLab, calculate the expected
secondary and primary voltage and currents.
Vsecondary
theory =________________ Isecondary
theory = ________________
I primary
theory = ________________ V primary
theory = _________________
6. Change
the circuit in the Week 7-Activity1a Multisim file from this week’s
Doc Sharing to match the circuit above. You don’t need to flip the transformer
horizontally. Just double-click the transformer and change the turns ratio as
indicated. Measure the following:
Vsecondary
simualted = ________________ Isecondary
simulated = ________________
I primary
simulated = ________________ V primary
simulated = ________________
7. The
next step is to build the circuit. Because of circuit loading, you will need to
put in approximately 2.6 Vrms to yield the desired 0.25 VRMS on
the primary side. Make sure you swap the transformer so that the ‘P’ is on the
secondary side. Measure the transformer primary and secondary voltages and
currents.
Vsecondary =
________________ Isecondary =
________________
I primary =
________________ V primary =
________________
Did the
simulated and measured values correspond with the theoretical ones?
ECT 125 Week 7 Lab
Assignment 3 | Devry University
Exercise: Troubleshooting
Transformers
1. Open the Multi Sim circuit labeled
transformer1.
2. Use the troubleshooting techniques
described in the Week 7 lecture notes to determine if a fault exists, and if
one exists where it is and what type of fault.
Circuit 1 fault _______________
3. Repeat the above procedures for the
rest of the transformer Circuits 2 through 4.
Circuit 2 fault _______________
Circuit 3 fault _______________
Circuit 4 fault _______________
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