Others Homeworkassignments
Exams
Notes & Summary
Computer Assignments
Useful Links
Common Mistakes 
Alsalam Alaikum wa Rahmat Allah
Dear EE205Student,
Welcome to EE205. I pray Allah that you find this course very useful and
enjoyable. An excellent start is needed.
This page serves my students in all semesters. It contains model exams,
projects,...etc . Some material may be found
through WebCT.
Best regards,
Dr. Ali Muqaibel
EE205 092 Class
Pictures of inductor & capacitors (ppt)
Course Syllabus092_v1
HW# 
Practice Assignment Problems 
Solution 
HW Problems to be submitted 
Due Date 
1 
HW1 Ch 11 Three Phase Circuits,
(Word File) 
Sol
HW1 
All Practice Problems 
Tuesday, Week 3 
2 
HW2 Ch 8, Natural and
Step Response of RLC Circuits (pdf) 
Sol
HW2 
HW2 (pdf) 
Tuesday Week 5 
3 
Handout:
Chapter 7:State
equation and computer aided analysis
6, 9, 21, 25,38, 40 
Sol HW3 
HW3 (pdf) 
Sunday,
Week 7 
4 
Handout:
Chapter 10: Resonant Circuits:
23, 26, 27, 33 
Sol
HW4 
HW4 (pdf) 
Tuesday, Week 9 
5 
Handout
Chapter 10: 40, 42 , 50 , 53, 54 
Sol HW5 
HW5 (pdf) 
Sunday, Week 10 
6 
Chapter 6: 34, 36, 38a, 44,45,46
(8th Edition)
Chapter 9: 72, 73,75,77 (8th Edition)
(if you do not have the 8th edition click here to get the questions) 
Sol HW6 
HW6 (pdf) 
Sunday, Week 12 
7 
Chapter
14: 14.3, 14.6, 14.8,
14.15, 14.20
and 14.25
(7the edition) 
Sol HW7 
HW7 (pdf) 

8 
Chapter 18:
18.3,
18.9, 18.10, 18.11 and 18.12
(7th edition) 
Sol HW8 
HW8 (pdf) 

Exams 031
Exam# 
Material 
Solution 
Q1 
[11.111.4] 
Sec01 ,
Sec02 
Q2 
[11.511.6] 
Sec01
, Sec02 
Q3 
[8.18.2] 
Sec01
, Sec02 
Q4 
[8.38.5] 
Sec01 ,
Sec02 
M1 
Ch8, Ch11, and (Ch7 from the handout) 
Exam,
Solution

Q5 
Resonant Circuits (Handout 10.3, HW#6) 
Short Sol.,
Long Sol. 
Q6 
Complex Frequency (SDomain) 
Sec01
, Sec02 
Q7 
Mutual Inductance (6.4,6.5, HW#8) 
Sec01
, Sec02 
M2 
Ch 10 (from handout), Ch 6 & Ch 9 
Exam &
Solution 
Q8 
Filters and Bode plot (HW#10) 
Sec01
, Sec02 
Q9 
Filters and Bode plot 
Solution 
F 
Final Exam 
Solution

These are some common mistakes.... if you find additional common
mistakes send them to me to list them. This way we can avoid them and make
them less common
1) Analysis of Balanced Three Phase Circuits

Mixing angular frequency (rad/sec) with frequency in (Hz). Do not
forget to do the proper transformation.

Remember that adding or subtracting 360 degrees does not change
the angle. (240 is equivalent to 120). Also when using the calculator do no
forget to make sure that it is set properly to radians or degrees.

When asked to find the three phase voltages or currents, do not
forget to find the values for the other two phases.

cos is used as a reference with angle zero. If sin
is used it has to be converted to sin if need be. sin x=
cos (x90).

Line Voltages (V_{AB},V_{BC},V_{CA} or V_{ab},V_{bc},V_{ca})
does not equal to voltage drop across the line (V_{aA}, V_{bB},
V_{cC}). This is a very common mistake.

If the frequency is negative do not forget to do the proper
change on the angle.

When using the equation for complex power, the conjugate is
usually forgotten.

If the total power is given do not forget to divide by 3 to draw
the single phase.

If the load is given as delta, you need to divide by three to
draw the single phase equivalent.

If the complex power is give as P+j Q, we cannot directly
represent this as resistance and inductance !
2) Natural & Step response of Series and Parallel RLC Circuits

alpha for series is different than alpha for parallel circuit. It
is very common to mix them.

When finding the type of response it is very common to compare
mega^2 with alpha.. You should compare omega with alpha.

After finding the constant in the response you should assign it
to the proper exponent (or expression). It is very common to write A1 in place
of A2 and so on.
3)

For Q = 2π
Remember that the maximum energy stored is measured after
summing W(t)_{C} & W(t)_{L }not individually and do not forget
2π.

Q is measured at resonance.

When finding the power lost in R do not forget 1/2 if I is an
amplitude value.

For impedance scaling :
R'=k_{m}R L'=k_{m}L C'=C/k_{m}
ω_{r}'=_{ }ω_{r} BW'= BW
R'=R L'=L/k_{f } C'=C/k_{f}
ω_{r}'=k_{f }ω_{r} BW'= k_{f} BW

Do not mix up the symbols of poles "X" and zeros "O" in polezero plot.

For the total energy stored in coupled coil
w(t)=1/2 L_{1} i_{1}^{2}(t) + 1/2 L_{2}
i_{2}^{2}(t) M
i_{1}(t) i_{2}(t)
there is no 1/2 before M.
Here is a nice one
