Dept. of Electrical and Electronic Engineering
The University of Hong Kong
ELEC 1202/2242
INTRODUCTION TO ELECTROMAGNETIC WAVES
AND FIELDS
LECTURE 4. ELECTRIC FIELD AND COULOMBS
LAW
Dr. Lijun Jiang
Department of Electrical and Electronic Engineering
The U
The Hong Kong University of Science and Technology
Department of Electronic and Computer Engineering
ELEC151 Digital Circuit and Systems
Homework 1
Issue Date: 13 Sep 2010
Due Date: 20 Sep 2010 (5:00pm)
* you need to do the homework by hand. *
Please put
The Hong Kong University of Science and Technology
Department of Electronic and Computer Engineering
ELEC151 Digital Circuit and Systems
Homework 5
Issue Date: 19 Nov 2009
Due Date: 26 Nov 2009 (5:00pm)
* You need to do the homework by hand. *
Please put
ELEC3200  System Modeling, Analysis and Control
Reference Solution to Midterm Exam, Spring 2014
March 28, 2014
G(s)
. Then by Theorem A.5, Appendix A,
s
i.e., the Final Value Theorem, we know that when Z(s) is a rational function with poles located in
th
ELEC3200 System Modeling, Analysis and Control
Reference Solution to Final Exam, Spring 2014
May 26, 2014
1. (a) As stated in Section 3.6, there exists mth order proper controller such that the closedloop
poles are arbitrarily assigned if and only it m n
ELEC3200 System Modeling, Analysis and Control
Final Exam, Spring 2012
r
e
u
C(s)
P (s)
z

6
Figure 1: A unity feedback system.
r
u
C(s)
P (s)
z

6
Figure 2: A 2DOF control system.
1. The response of an LTI system to input u(t) = (sin t)(t) is y(
ELEC151 MIDTERM EXAM 1 1999
991. TwoLevel Combinational Logic (25%)
Design a TWOBIT COMPARATOR to compare the magnitude of two numbers,
P = Ax2 + B and Q = Cx2 + D
A twobit comparator has possibly 4 outputs as follows:
F1 (equal to) is 1
when P = Q
F2
ELEC3200 System Modeling, Analysis and Control
Final Exam, Spring 2013
r
eC(s)
uP (s)
z

6
Figure 1: A unity feedback system.
r
uP (s)
C(s)
z

6
Figure 2: A 2DOF control system.
1. A signal x(t) has Laplace transform
X(s) =
s4
2s3 + s2 + 4s + 5
.
+
1.
ELEC151 DIGITAL CIRCUITS AND SYSTEMS
MIDTERM EXAMINATION #1
Date:
17Oct2001
Time:
16:05 16:55
Place:
Lecture Theatre B
Incompletely Specified Functions (25%)
Design a TWOBIT SUBSTRACTOR to calculate R = P  Q,
Where P = A 2 + B and Q = C2 + D are t
1.
ELEC151 DIGITAL CIRCUITS AND SYSTEMS
MIDTERM EXAMINATION #1
Date:
Fall 2000
Time:
12:00 12:50
Twolevel Combinational Logic (30%)
Design a TWOBIT MULTIPLIER to calculate R = P x Q,
where P = A 2 + B and Q = C2 + D are the 2bit input numbers, and
R =
The Hong Kong University of Science and Technology
Department of Electronic and Computer Engineering
ELEC151 Digital Circuit and Systems
Homework 3
Issue Date: 15 Oct 2009
Due Date: 22 Oct 2009 5:00pm
* You need to do the homework by hand. *
Please put yo
Dept. of Electrical and Electronic Engineering
The University of Hong Kong
ELEC 1202/2242
INTRODUCTION TO ELECTROMAGNETIC WAVES
AND FIELDS
LECTURE 8. WAVE PROPAGATION
Dr. Lijun Jiang
Department of Electrical and Electronic Engineering
The University of Ho
Electrostatic Marking (Combine)
1.
a) The resultant electric force F on R is given by
1A
1A
b) The direction is given by
1A
1A
2.
a)
At X, the electric fields due to A and B are downward.
1A
1A
1A
1A
3"  z
. (a) 1) .
l
l
tension 1
electric force '
F 2 cm —>
weight
1 N
ii) The angle of the string with the vertical
is given by
sinﬁ=i .'.6 =1 1.5a
10
Considering forces on A:
vertical: 7" cos B = I .(l)
ihorizontal: Tsin B = F . (2)
F = mm) = tan 1 1.
Electrostatic Marking (Pure)
1.
a) The resultant electric force F on R is given by
1A
1A
b) The direction is given by
1A
1A
2.
a)
At X, the electric fields due to A and B are downward.
1A
1A
1A
1A
3.
1A
1A
1A
1A
1A
1A
1A
1A
1A
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The Hong Kong University of Science and Technology
Department of Electronic and Computer Engineering
ELEC151 Digital Circuit and Systems
Homework 6
Issue Date: 26 Nov 2010
Due Date: 6 Dec 2010 (5:00pm)
Please put your assignment into the collection boxes
The Hong Kong University of Science and Technology
Department of Electronic and Computer Engineering
ELEC151 Digital Circuit and Systems
Homework 4
Issue Date: 5Nov2010
Due Date: 12Nov2010 5:00pm
* You need to do the homework by hand. *
Please put you
The Hong Kong University of Science and Technology
Department of Electronic and Computer Engineering
ELEC151 Digital Circuit and Systems
Homework 2
Issue Date: 27 Sept, 2009
Due Date: 4 Oct 2009 5:00pm
* you need to do the homework by hand. *
Please put y
ELEC151 MIDTERM EXAM 1 1998
981. Twolevel Combinational Logic (20%)
Design a TWOBIT MULTIPLIER to calculate R = P x Q,
where P = A 2 + B and Q = C2 + D are the 2bit input numbers, and
R = W 8 + X 4 + Y2 + Z is the 4bit output number.
Do the design ac