ECE472
EXAM #1
FALL 2013
Instructions:
1. Closed-book, closed-notes, open-mind exam. You may only use the exam objectives distributed in class.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit.
ECE472
EXAM #2
FALL 2013
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
4. Leave on
ECE472
EXAM #2 SOLUTIONS
FALL 2008
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
4
ECE472
EXAM #2 SOLUTIONS
FALL 2012
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
4
ECE472
EXAM #2 SOLUTIONS
FALL 2013
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
4
ECE472
HOMEWORK #1 SOLUTIONS
FALL 2013
Problem 1.1
v(t) (V)
2V m
Vm
3T
4
T
0
T
V m
T
4
t (s)
2
2Vm
Compute Vrms for the above periodic waveform.
2
Vrms =
=
[
=
1 T2
4 T /4 2
2 /2 2
v (t) dt =
v (t) dt =
v () d
T0
T0
0
[
]
cfw_
/2
/3
2
2 [ 2 ]/3 [ 2 ]/2
ECE472
HOMEWORK #3 SOLUTIONS
Problem 3.1 (Problem 3-1 p. 106)
Vo,avg
Vm
170
=
=
= 3.608 A
R
R
15
Vo,rms
Vm
170
(b) Irms =
=
=
= 5.667 A
R
2R
2 15
2
Vrms
(170/2)2
2
(c) P = RIrms =
=
= 481.7 W
R(
) ( 15
)
170
170
= 681.2 VA
(d) S = Vrms Irms =
30
2
P
481
ECE472
HOMEWORK #6 SOLUTIONS
Problem 6.1 (Problem 4-34 p. 167)
% MATLAB script for Problem 4-34 p. 167
clear all; clc;
f = 60; T = 1/f; VmLL = 480*sqrt(2); R = 50;
% Part (a)
n = 6;
Voavg = VmLL*(n/pi)*sin(pi/n);
Ioavg = Voavg/R
% Part (b)
Vorms = VmLL*sq
ECE472
EXAM #1 SOLUTIONS
FALL 2013
Instructions:
1. Closed-book, closed-notes, open-mind exam. You may only use the exam objectives distributed in class.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for parti
ECE472
EXAM #1 SOLUTIONS
FALL 2012
Instructions:
1. Closed-book, closed-notes, open-mind exam. You may only use the exam objectives distributed in class.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for parti
ECE472
EXAM #1 SOLUTIONS
FALL 2007
Instructions:
1. Closed-book, closed-notes, open-mind exam. You may only use the exam objectives distributed in class.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for parti