THE CITY COLLEGE OF NEW YORK
Department of Electrical Engineering
ENGR 204/B Electrical Circuits (Fall 2024) MW 9:30-10:45pm
Professor K. M. Sobel,
Office: ST654/655
ksobel@ccny.cuny.edu
Office Hours: MW 11:00-11:30am, Th 10:00-11:00am, 2:00-3:00pm
No office hours on the following Thursdays: Oct 3, 17, 24; Nov 14, 21, 28
Note that Tu Oct 15 is a Monday schedule and Wed Nov 27 is a Friday schedule.
In addition to office hours, students can email me anytime.
Honepage: https://www.ccny.cuny.edu/profiles/kenneth-sobel
Pre/Corequisites: Phys 208(Min. C); Math 203 (Min. C) or Math 213 (Min. C)
Required Textbook (ebook): Fundamental of Electric Circuits, C.K. Alexander and M.N.O. Sadiku 7th Ed.
Email: Students must have a valid citymail address as the preferred email in cunyfirst. Communications will be
emailed to students using CUNYFIRST.
Exams: There will be 3 in-term exams plus a final exam. All exams will be closed book, closed notes. No makeup
in-term exams will be given. Dates for the in-term exams are Wednesday September 25, Wednesday October 30, and
Wednesday November 13. The final examination will be Monday December 16 8:00-10:15am. Exams that are
submitted for regrading will be subject to the "Exam Regrading Policy" which is described below. Exams will cover the
material covered in class and in the homework.
To receive full credit you must show all details of all work.
Calculators may not be used for the in-term exams. Calculators are required for the final exam but are subject to the
following restrictions.
1.
Calculators may only be used for addition, subtraction, multiplication, division, square, square root, sine,
cosine, and arctangent.
2.
You may not use calculator functions that convert from polar to rectangular or rectangular to polar.
3.
You may not use calculator functions that solve simultaneous equations or that compute a matrix inverse or
that solve for determinant.
All devices that can receive or transmit a radio frequency signal must be turned off and stowed away during
examinations. This includes, but is not limited to, cellphones, iphones, and apple watch.
Homework:
Homework will be assigned and submitted in the HW assignments folder in Blackboard.
There will be 21 homework assignments.
Late submissions will be accepted until Prof. Sobel grades the assignments, at which time homework solutions will be
posted in the HW solutions folder in Blackboard.
No assignments will be accepted after the solutions are posted in Blackboard,
Grades:
20% for Exam #1 + 20% for Exam #2 + 20% for Exam #3 + 30% for Final Exam + 10% homework
A+(97-100),A(94-96),A-(90-93),B+(87-89),B(84-86),B-(80-83),C+(77-79),C(74-76),C-(70-73),D(60-69),F(<60)
If you miss one in-term exam because of documented illness, then your grade will be computed as shown below.
Documented illness requires a note from a physician. Undocumented absences will be counted as zero.
25% each for the two in-term exams completed + 40% for Final Exam + 10% homework.
Exam Regrading Policy:
Individual exam problems will not be re-graded. You may submit your exam for regrading, in which case all your
exam problems will be regraded. Your new grade may be higher or lower than your original grade. Exams that are
written in part or in whole using pencil or erasable ink will not be accepted for regrading. Exams that use correction
fluid or correction tape will not be accepted for regrading. Exams must be submitted for regrading within fourteen (14)
calendar days of the examination date.
INC Policy: The grade of INC will only be assigned to students who are passing the course prior to the final exam.
Students who are failing the class and do not appear for the final examination will be assigned the grade of F. Students
who are failing are not eligible for a makeup final examination.
Absence Policy: Students who are (1) absent from more than four classes, and (2) are passing the class, may be
assigned the grade WU. No distinction is made between excused and unexcused absences.
Disability policy: “In compliance with CCNY policy and equal access laws, appropriate accommodations are
administered by the AccessAbility Center. Students who register with AccessAbility, and are entitled to specific
accommodations, must request a letter from AccessAbility to present to the Professor that states what their
accommodations are. If specific accommodations are required for a test, students must present an “Exam
Administration Request Form” from AccessAbility, at least one week prior to the test date in order to receive
their accommodations.”
Prohibited Recording: Photography, video recording, and audio recording are not allowed during class.
Course Outline
Basic concepts.
1.2. Systems of Units
1.3. Charge and Current
1.4. Voltage
1.5. Power and Energy
1.6. Circuit Elements
Basic circuit laws.
2.2. Ohm’s Law
2.3. Nodes, Branches, and Loops
2.4. Kirchhoff’s Laws
2.5. Series Resistors and Voltage Division
2.6. Parallel Resistors and Current Division
Methods of analysis.
3.2. Nodal Analysis
3.3. Nodal Analysis with Voltage Sources
3.4. Mesh Analysis
3.5. Mesh Analysis with Current Sources
Circuit theorems.
4.2. Linearity Property
4.3. Superposition
4.4. Source Transformation
4.5. Thevenin’s Theorem
4.6. Norton’s Theorem
Operational amplifiers.
5.2. Operational Amplifiers
5.3. Ideal Op Amp
5.4. Inverting Amplifier
5.5. Noninverting Amplifier
5.6. Summing Amplifier
5.7. Difference Amplifier
5.8. Cascaded Op Amp Circuits
Capacitators and inductors.
6.2. Capacitors
6.3. Series and Parallel Capacitors
6.4. Inductors
6.5. Series and Parallel Inductors
Sinusoids and phasors.
9.2. Sinusoids
9.3. Phasors
9.4. Phasor Relationships for Circuit Elements
9.5. Impedance and Admittance
9.6. Kirchhoff’s Laws in the Frequency Domain
9.7. Impedance Combinations
Sinusoidal-Steady State Analysis
10.2 Nodal analysis
10.3 Mesh analysis
10.4 Superposition
10.5 Source Transformation
10.6 Thevenin and Norton equivalent circuits
Exam Description
Exam #1
No calculators allowed.
Q1: must be solved using only the methods described in chapter 2 of the book. You may be asked to find voltages,
currents, and power.
Q2: mesh method without supermesh. Cramer’s Rule.
Q3: node method with supernode. Cramer’s Rule.
Exam#2
No calculators allowed.
Q1: mesh method with supermesh. Cramer’s Rule.
Q2. superposition.
Q3. Thevenin equivalent.
Exam#3
No calculators allowed.
1. (35 pts) Norton equivalent
2. (30 pts) multiple op-amp circuit
3. (35 pts) multiple inductor circuit
Final exam
Calculators required subject to restrictions described on page 1 of this syllabus.
1. (35 pts) sinusoidal steady state: mesh analysis/Cramer’s rule problem or node analysis/Cramer’s rule problem (no
choice)
2. (35 pts) sinusoidal steady state: superposition
3. (30 pts) sinusoidal steady state: Thevenin equivalent
Comment that applies to all exams
Read the exam questions carefully. Some questions may specify which methods you must use to solve the problem.
Some questions may specify which methods you cannot use to solve the problem.
Some comments about final exam
1. Phasors are complex numbers that represent a sinusoid. Complex numbers in polar form are magnitude and phase.
Magnitude can never be negative.
2. You can never add phasors corresponding to different frequencies.
3. Mesh analysis problem may require supermesh, node analysis problem may require supernode.
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8/20/24