EE211 Quizzes
Spring 2001
Instructor: Dr. K.D. Donohue
Quiz 1
Find the power absorbed or supplied by each element
in the circuit below. Use only the formulas and
concepts from Chapter 1 to solve. (Show work).
Ix = 6 A
+
4V
_
+ 2V 1
I1 = 4 A
2
1
Ix
3
Quiz 2
Find the current Io in the circuit below.
Ix
12 
Io
2A
8
-0.5Ix
Quiz 3
Given Vs = 10 V, find Vo in the circuit below:
8k 
2k 
VS
12k 
4k 
+
Vo
-
Quiz 4
A) (2 points) Find Vo by nodal analysis.
B) (2 points) Find Io by loop analysis.
+ Vo 15 
60 
Io
30
+ Vd 2V
20
Vd
15
Quiz 5
Use Norton’s theorem to find I0 in the
Circuit below:
12V
3
2A
6
Io
3
3
Quiz 6
Given vi(t) = 10sin(20t) V, find vo(t).
10 k
1 F
vi(t)
+
vo(t)
-
Quiz 7 (Take Home)
This is due Thursday March 1, 2001 at the beginning of the class period. Students must work independently on this assignment,
NO COLLABORATION. Any detected cheating will result in an E for the course for all involved parties. You are free to use any
books, notes, or computer programs to solve this. If you get a result from a computer or calculator program (i.e. to solve a system
of equations), indicate the program used to obtain the result. Otherwise all work done to obtain the result should be clearly
shown.
A. Derive a set of equations that describe a complete set of node voltages or loop currents in
the circuit below (2 points).
B. Use the set of equations to find Va (0.5 points).
C. Simulate the circuit in SPICE and determine Va (submit printout of SPICE schematic with
correct meter reading for Va) (1.5 points).
10 mA
5 k
50 k
10 k
+
Va
-
2 k
0.5 Ia
30 k
5V
Ia
25 k
1 k
3Va
10 k
Quiz 8
Determine equation for vo(t) for t > 0.
8k
t=0
+
6V
6k
vo(t)
-
.05mF
Quiz 9
Find the equation for i(t), for t > 0, assume voltage on capacitor is 0 for
t = 0-
t=0
10 V
7

10
10
F
6
i(t)
1
H
10
Quiz 10 (Take Home)
This is due Thursday March 29, 2001 at the beginning of the class period. Students must work independently on this assignment, NO
COLLABORATION. Any detected cheating will result in an E for the course for all involved parties. You are free to use any books,
notes, or computer programs to solve this. If you get a result from a computer or calculator program (i.e. to solve a system of equations),
indicate the program used to obtain the result. Otherwise all work done to obtain the result should be clearly shown.
(a) Use SPICE to plot vo(t) for t > 0. The time axis should be long enough to show voltage
has reached an effective steady-state. Hand in a hardcopy of the circuit drawn in SPICE
and the plot. Also email me the SPICE circuit as an attachment by the due date. If you
used a program other than B2SPICE, please indicate that in your email (3 points)
(b) Find complete solution for vo(t) for t > 0 analytically. (1 point)
1 k
19 
+ vo(t) -
5[u(t)-u(t-0.1)] V
0.1 mF
0.1 H
Quiz11
For vs(t) = 10cos(100t) V
A) Draw frequency domain circuit (2pts)
B) Find io(t) (steady-state) (2pts)
0.4 H
io
vs
20 
0.5 mF
Quiz 12
1) Find the phasor quantity for io in the circuit below.(1.5)
2) Draw and label the phasor diagram for the voltages over each element in this loop.
(1.5)
3) Describe in words what happens to
vo
as the frequency of the source increases. (1)
io
10 cos(100 t  45 ) V

1mF
8
vo

Quiz 13
a) Find the Thévenin equivalent circuit ( Vˆs and ẐTH ) in
terms of phasors and impedances wrt terminals C and B
(note: Remove 1  load resistor first). (3 points)
b) Use equivalent circuit to find VˆCB when 1  load
resistor is replaced (1 point)
C
2
2
 j1
j 2
60 A
1

Vˆ
CB

B
C
Thévenin’s Equivalent Circuit
Vˆs
Ẑ TH
B
Quiz 14 Take Home
This is due Tuesday Dec. 5, 2000 at the beginning of the class period. Students must work independently on this
assignment, NO COLLABORATION. Any detected cheating will result in an E for the course for all involved parties.
Hand in a hard copy of the circuit and tables from SPICE that clearly show the requested results (can print directly
from SPICE or paste into another program and print). Email the SPICE circuit file used in the simulation to
donohue@engr.uky.edu before 12/5/00 at 2pm. If you used a software package other than B2 SPICE, please indicate
that in your email. Also make sure your name is somewhere on the email.
Use SPICE to find the phasors for the steady-state response of vo(t), when
fo = 1, 10, 100, 225, and 1000 Hz. The magnitudes should be linear (i.e not in
dB) and phase should be in degrees.
0.1 F
20 k
5 k
1
cos2f ot  V
2
0.1 F
5 k
5 k
+
vo(t)
-