Electric Circuits II
ELT-341-CRF01
Spring 2012
Instructor:
Jim Trepka
Other Instructor
Information:
Office: 140 Jones Hall
Telephone: 398-7146
Email: jim.trepka@kirkwood.edu
Home Page: http://faculty.kirkwood.edu/jtrepka/
Section Number:
0168021
Monday 10:00-11:50
Tuesday 12:00-1:00
Wednesday 11:00-11:50
Thursday 12:00-1:00
Friday 10:00-11:50
Credit hours:
5
Course description:
Adapts DC circuit analysis techniques to the AC realm. The fundamental
concepts of passive filters and frequency response are also examined.
Learning activities will include computer simulations and extensive
laboratory sessions to allow the student to investigate these concepts.
Prerequisites:
ELT-272, ELT-340
Course Materials
Needed:
1. Circuit Analysis: Theory and Practice, Robbins & Miller, 4th Edition,
(Delmar Learning).
2. Lab manual to accompany text, Robbins & Miller, 4th edition, (Delmar
Learning).
3. RF Clicker
Books and course materials for this course are available at the Kirkwood
Bookstore.
Learning Outcomes,
Course Competencies
Objectives, and
1. Compute and analyze AC signal characteristics
Course Competencies:
2. Define, compute, and measure R, L, and C Impedances
3. Compute P, Q, and S for AC Power
4. Define, compute, and measure AC series-parallel circuits
5. Analyze a Bridge Network
6. Apply Thevenin’s Theorem to an AC circuit
7. Define, compute, and measure series and parallel resonance
circuits
8. Analyze low-pass, high-pass, band-pass, and band-reject filters.
9. Compute all parameters for transformers.
10. Analyze three-phase systems.
Textbook Learning Objectives (wording from Circuit Analysis with
Devices: Theory and Practice, Robbins & Miller, 1st Edition, Delmar
Learning)
Chapter 15 Objectives
- Explain how AC voltages and currents differ from DC
- Draw waveforms for AC voltage and currents and explain what they
mean.
- Explain the voltage polarity and current direction conventions used
for AC.
- Describe the basic AC generator and explain how AC voltage is
generated.
- Define and compute frequency, period, amplitude, and peak-to-peak
values.
- Compute instantaneous sinusoidal voltage or current at any instant in
time.
- Define the relationships between ώ, T, and f for a sine wave.
- Define and compute phase differences between waveforms.
- Use phasors to represent sinusoidal voltages and currents.
- Determine phase relationships between waveforms using phasors.
- Define and compute average values for time-varying waveforms.
- Define and compute effective (rms) values for time-varying
waveforms.
- Use MultiSIM to study AC waveforms.
Chapter 16 Objectives
- Express complex numbers in rectangular and polar forms.
- Represent AC voltage and current phasors as complex numbers.
- Represent AC sources in transformed form.
- Add and subtract currents and voltages using phasors.
- Compute inductive and capacitive reactance
- Determine voltages and currents in simple AC circuits.
- Explain the impedance concept.
- Determine impedance for R, L, and C circuit elements.
- Determine voltages and currents in simple AC circuits using the
impedance concept.
- Use MultiSIM to solve simple AC circuit problems.
Chapter 17 Objectives
- Explain what is meant by active, reactive, and apparent power.
- Compute the active power to a load.
- Compute the reactive power to a load.
- Compute the apparent power to a load.
- Construct and use the power triangle to analyze power to complex
loads.
- Compute power factor.
- Explain why equipment is related in VA instead of watts.
- Measure power in single-phase circuits.
- Describe why effective resistance differs from geometric resistance.
- Describe energy relations in AC circuits.
Chapter 18 Objectives
- Apply Ohm’s law to analyze simple series circuits.
- Apply the voltage divider rule to determine the voltage across any
element in a series circuit.
- Apply Kirshhoff’s voltage law to verify that the summation of voltages
around a closed loop is equal to zero.
- Apply Kirchhoff’s current law to verify that the summation of currents
entering a node is equal to the summation of currents leaving the
same node.
- Determine unknown voltage, current, and power for any
series/parallel circuit.
- Determine the series or parallel equivalent of any network consisting
of a combination of resistors, inductors, and capacitors.
Chapter 19 Objectives
- Convert an AC voltage source into its equivalent current source, and
conversely, convert a current source into and equivalent voltage
source.
- Solve for the current o9r voltage in a circuit having either a dependent
current source of a dependent voltage source.
- Set up simultaneous linear equations to solve an AC circuit using mesh
analysis.
- Use complex determinants to find the solutions for a given set of
linear equations.
- Set up simultaneous linear equations to solve an AC circuit using
nodal analysis.
- Perform delta-to-wye and wye-to-delta conversions for circuits having
reactive elements.
- Solve for the balanced condition in a given AC bridge circuit. In
particular, you will examine the Maxwell, Hay, and Schering bridges.
- Use MultiSIM to analyze bridge circuits.
Chapter 20 Objectives
- Apply the superposition theorem to determine the voltage across or
current through any component in a given circuit.
- Determine the Thévenin equivalent of circuits having independent
and/or dependent sources.
- Determine the Norton equivalent of circuits having independent
and/or dependent sources.
- Apply the maximum power transfer theorem to determine the load
impedance for which maximum power is transferred to the load from
a given circuit.
- Use MultiSIM to find the Thévenin and Norton equivalents of circuits
having either independent of dependent sources.
Chapter 21 Objectives
- Determine the resonant frequency and bandwidth of a simple series
or parallel circuit.
- Determine the voltages, currents, and power of elements in a resonant
circuit.
- Sketch the impedance, current, and power response curves of a series
resonant circuit.
- Find the quality factor, Q, of a resonant circuit and use Q to determine
the bandwidth for a given set of conditions.
- Explain the dependence of bandwidth on the L/C ratio and on R for
both a series and a parallel resonant circuit.
- Design a resonant circuit for a given se of parameters.
- Convert a series RL network into an equivalent parallel network for a
given frequency.
Chapter 22 Objectives
- Evaluate the power gain and voltage gain of a given system.
- Express power gain and voltage gain in decibels.
- Express power levels in dBm and voltage level in dBV and use these
levels to determine power gain and voltage gain.
- Identify and design simple (first-order) RL and RC low-pass and highpass filters and explain the principles of operation of each type of
filter.
- Write the standard form of a transfer function for a given filter. The
circuits that are studied will include band-pass and band-stop as well
as low- and high-pass circuits.
- Compute τc and use the time constant to determine the cutoff
frequency (ies) in both radians per second and hertz for the transfer
function of any firs-order filter.
- Sketch the Bode plots showing the frequency response of voltage gain
and phase shift of any first-order filter.
Chapter 23 Objectives
- Describe how a transformer couples energy from its primary to its
secondary via a changing magnetic field.
- Describe basic transformer construction.
- Use the dot convention to determine transformer phasing.
- Determine voltage and current ratios from the turns ratio for ironcore transformers.
- Compute voltage and currents in circuits containing iron-core and aircore transformers.
- Use transformers to impedance match loads.
- Describe some basic transformer applications.
- Determine transformer equivalent circuits.
- Compute iron-core transformer efficiency.
- Use MultiSIM to solve circuits with transformers and coupled circuits.
Lab Objectives (wording from Lab manual to accompany Circuit
Analysis with Devices: Theory and Practice, Robbins & Miller, 3rd Edition,
Delmar Learning)
Lab 13 Objectives
- Measure rms values for sinusoidal voltage.
- Measure superimposed AC and dc voltages.
- Measure AC current using a sensing resistor.
- Display two waveforms simultaneously on a dual channel
oscilloscope.
- Measure phase displacement with a dual channel oscilloscope.
- Measure voltage using differential measurement techniques.
Lab 14 Objectives
- Measure phase difference between voltage and current in a
capacitance.
- Measure capacitive reactance and verify theoretically.
- Determine the effect of frequency on capacitive reactance.
Lab 15 Objectives
- Measure phase difference between voltage and current in an
inductance.
- Measure inductive reactance and verify theoretically.
- Determine the effect of frequency on inductive reactance.
Lab 16 Objectives
- Measure power in a single phase circuit.
- Verify power relationships.
- Verify power factor relationships.
- Determine the effect of adding power factor correction.
Lab 17 Objectives
- Calculate current and voltages for a simple series ac circuit.
- Measure voltage magnitude and phase angle in a simple series AC
circuit.
- Verify Kirchhoff’s voltage law using measured results.
- Measure the internal impedance of a sinusoidal voltage source.
Lab 18 Objectives
- Measure voltages in a parallel circuit using an oscilloscope.
- Use an oscilloscope to indirectly measure current magnitude and
phase angles in a simple parallel AC circuit.
- Compare measure values to theoretical calculations and verify
Kirchhoff’s current law.
- Determine the power dissipated by a parallel AC circuit.
Lab 19 Objectives
- Analyze a series-parallel circuit to determine the current through and
voltage across each element in a series-parallel circuit.
- Measure voltage across each element in a series-parallel circuit using
an oscilloscope and use the measurements to determine the current
through each element of a series-parallel circuit.
- Calculate the power dissipated by each element in a circuit.
- Use measurements to verify that the actual powers dissipated
correspond to theory.
Lab 20 Objectives
- Calculate the Thévenin and Norton equivalents of an AC circuit.
- Measure the Thévenin (open circuit) voltage and the Norton (short
circuit) current of an AC circuit.
- Calculate the Thévenin impedance of a circuit using the measured
values of Thévenin voltage and Norton current.
- Measure the load impedance which results in a maximum transfer of
power to the load.
Lab 21 Objectives
- Calculate the resonant frequency of a series resonant circuit.
- Solve for the maximum output voltage of a resonant circuit using the
quality factor Q of the circuit.
- Measure the bandwidth of a series resonant circuit.
- Measure the impedance at frequencies above and below the resonant
frequency and observe that it is purely resistive only at resonance.
- Sketch the circuit current as a function of frequency and explain why
the response has a bell-shaped curve when plotted on a semilogarithmic graph.
Lab 22 Objectives
- Calculate the resonant frequency of a parallel resonant circuit.
- Solve for the maximum output voltage of a parallel resonant circuit.
- Measure the bandwidth of a parallel resonant circuit.
- Measure the impedance at frequencies above and below the resonant
frequency and observe that it is purely resistive at resonance.
- Sketch the output voltage as a function of frequency and explain why
the response has a bell-shaped curve when plotted on a semilogarithmic graph.
Lab 23 Objectives
- Develop the transfer function for a low-pass filter circuit.
- Determine the cutoff frequency of a low-pass filter circuit.
- Sketch the Bode plot of the transfer function for a low-pass filter.
- Compare the measure voltage gain response of a low-pass filter to the
theoretical asymptotic response predicted by a Bode plot.
- Explain why the voltage gain of a low-pass filter drops at a rate of 20
dB for each decade increase in frequency.
Lab 24 Objectives
- Develop the transfer function for a high-pass filter circuit.
- Determine the cutoff frequency of a high-pass filter circuit.
- Sketch the Bode plot of the transfer function for a high-pass filter.
- Compare the measure voltage gain response of a high-pass filter to the
theoretical asymptotic response predicted by a Bode plot.
- Explain why the voltage gain of a high-pass filter increases at a rate of
20 dB/decade below the cutoff frequency.
Lab 25 Objectives
- Calculate the cutoff frequencies of a bandpass filter by examining the
low-pass and high-pass stages of a filter.
- Derive the transfer function for each stage of a bandpass filter.
- Sketch the Bode plot of a bandpass filter from the transfer function of
the individual stages.
- Explain why the slopes of the voltage gain response are 20 dB/decade
on each side of the cutoff frequencies.
Lab 27 Objectives
- Verify the turns ratio and phase relationships for a transformer.
- Verify the concept of reflected impedance.
- Determine the frequency response of an audio transformer.
- Measure the regulation of a power transformer.
Assessment of
Student Learning:
Student learning will be assessed via exams, homework, and class room
participation.
Late Work/Make-up
Test Policy:
Missed exams must be made up on or before the next class period. In a
rare situation where the exam can not be made up in that time period,
the student will be given an exam different than that taken by the rest of
the class.
Class Attendance
Policy and College
Sponsored Activities:
As stated in the Student handbook: In compliance with Public Law 105244, Kirkwood Community College makes a wide variety of general
institutional information available to students.
For additional information, go to
http://www.kirkwood.edu/pdf/uploaded/630/student_handbook.pdf
Productive Classroom See student handbook
Learning
http://www.kirkwood.edu/pdf/uploaded/630/student_handbook.pdf
Environment:
Plagiarism Policy:
See student handbook
http://www.kirkwood.edu/pdf/uploaded/630/student_handbook.pdf
Campus Closings:
See student handbook
http://www.kirkwood.edu/pdf/uploaded/630/student_handbook.pdf
Learning
Environment
Expectations:
The classroom and laboratory conditions will be conducive to teaching
and student learning. To promote and maintain that environment, all
pagers, cellular phones, and other autonomous means of communication
shall be deactivated during instructional periods. RINGING OF CELL
PHONES DURING CLASS WILL RESULT IN POINTS DEDUCTED FROM
YOUR CLASS ROOM PARTICPATION AND PROFESSIONAL CONDUCT
GRADE. Participants are expected to come to class prepared to actively
participate in class.
Americans with
Disabilities Act:
Students with disabilities who need accommodations to achieve course
objectives should file an accommodation application with Learning
Services, Cedar Hall 2063 and provide a written plan of accommodation
to your instructor prior to the accommodation being provided.
Student Evaluation:
Unit Exams - Exams will be given after every 2 or 3 chapters totaling
30% of your final grade. Missed exams must be made up on or before the
next class period. In a rare situation where the exam can not be made up
in that time period, the student will be given an exam that is different
than that taken by the rest of the class.
Final Exam - The final exam will be worth 20% of your final grade.
Homework – The homework schedule can be found at
http://faculty.kirkwood.edu/site/index.php?p=18775 . Homework will
be worth 20% of your final grade.
Labs - Labs will be worth 25% of your final grade. THERE WILL BE NO
MAKE UP LABS!!!
Class Room Participation, and Professional Conduct - 5% of your
final grade
Points will be added to classroom participation and professional conduct
grade based on the following:
1. Answering PRS Clicker questions
Points will be deducted from the classroom participation and
professional conduct grade for the following:
1. Inappropriate language or jokes.
2. Ringing of cell phones in class.
3. Disrupting the class.
4. Leaving class early.
5. Not cleaning up workspace at the end of the class.
How final grades are
determined:
As described above.
Grading Scale:
Drop Date:
B+
87 –
89.99
A
94 - 100
B
83 –
86.99
A-
90 –
93.99
B-
80 –
82.99
C+
77 –
79.99
D+
67 –
69.99
C
73 –
76.99
D
63 –
66.99
C-
70 –
72.99
D-
60 –
62.99
F
59.99
and
less
Students dropping a class during the first two weeks of a term may
receive a full or partial tuition refund for 16 week terms, for shorter
courses check with Enrollment Services for total withdraw information.
Details of the refund schedule are available from Enrollment Services in
216 Kirkwood Hall. For detailed discussion of drop dates and policies,
please read the student handbook.
The last date to drop this class for this term is April 13, 2012.
Final Exam
Information:
Final exams are scheduled during the last week of the term from May 7,
2012 to May 11, 2012. The final exam for this class is scheduled on
Tuesday May 8, 2012 at 10 am.
Emergency
Information:
See student handbook
http://www.kirkwood.edu/pdf/uploaded/630/student_handbook.pdf
Other Information:
none
Rev. 9/06
Rev. 9/1/07
Rev.7/09
Rev. 3/11
Rev. 4/11
Rev. 5/11