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mmoL;
QATAR UNIVERSITY
Problem IA 53 Points!
Three lightbulbs are connected to 240 V voltage source as shown in the
gure lA below. Calculate:
a. The total current supplied by the battery
b. The current through each bulb
c. The resistance of eachbulb.
College of Engineering
Electrical Engineering Department
ELEC 201  Electric Circuit
Fall 2015
Final Exam
Problem 1 Problem 2 Problem 3 Problem 4 Problem 5 Problem 6 Problem 7
[120 Minutes] [Total Points 35]
January 06th, 2016
2:00 PM 4.00 PM
Instructions
ELE201 Electric Circuits and Devices
Quiz 3 (2 Problems 30 minutes)
Instructor: Dr. Serkan KIRANYAZ
Name: _
Id.: _
Instructions: This is a closed notes, closed book quiz. Please do not talk to anyone during
the quiz. If you get caught cheating, your pape
ELEC201 Electric Circuits and Devices
Midterm Exam Key (3 Problems 1 hour)
Instructor: Dr. Serkan KIRANYAZ
Name: _
Id. Number: _
Instructions: This is a closed notes, closed book exam. Please do not talk to anyone during the
quiz. If you get caught cheat
ELEC201 Electric Circuits and Devices
Quiz 4 Key (1 Problem 20 minutes)
Instructor: Dr. Serkan KIRANYAZ
Name: _
Id. Number: _
Instructions: This is a closed notes, closed book quiz. Please do not talk to anyone during
the quiz. If you get caught cheating
ELEC201 Electric Circuits and Devices
Midterm Makeup Key (3 Problems 1 hour)
Instructor: Dr. Serkan KIRANYAZ
Name: _
Id. Number: _
Instructions: This is a closed notes, closed book exam. Please do not talk to anyone during the
quiz. If you get caught che
ELE201 Electric Circuits and Devices
Quiz 3 (2 Problems 30 minutes)
Instructor: Dr. Serkan KIRANYAZ
Name: _
Id.: _
Instructions: This is a closed notes, closed book quiz. Please do not talk to anyone during
the quiz. If you get caught cheating, your pape
ELEC201 Electric Circuits and Devices
Midterm Exam Key (5 Problems 2 hours)
Instructor: Dr. Serkan KIRANYAZ
Name: _
Id. Number: _
Instructions: This is a closed notes, closed book exam. Please do not talk to anyone during the
quiz. If you get caught chea
ELEC201 Electric Circuits and Devices
Quiz 4 KEY (2 Problem 30 minutes)
Instructor: Dr. Serkan KIRANYAZ
Name: _
Id. Number: _
Instructions: This is a closed notes, closed book quiz. Please do not talk to anyone during
the quiz. If you get caught cheating
2015 First Workshop on Smart Grid and Renewable Energy (SGRE 2015)
Power Quality Effect of Using Incandescent,
Fluorescent, CFL and LED Lamps on Utility Grid
Mohd. Shafiul Islam, Noor Alam Chowdhury, Abdul Kader Sakil, Amith Khandakar, AtifIqbal, Haitham
International Journal of Ambient Energy
ISSN: 01430750 (Print) 21628246 (Online) Journal homepage: http:/www.tandfonline.com/loi/taen20
Impact on power quality due to largescale
adoption of compact fluorescent lamps a review
Rashid Alammari, Mohd. Shaf
Department of Electrical Engineering
Digital Systems Design (ELEC261)
Tutorial 3: Discrete Logic Implementation
For all questions show all your working in detail
1.
2.
3.
Sketch the logic diagram for the following logic functions:
(a)
= (. ) + (. . ) + +
Department of Electrical Engineering
Digital Systems Design (ELEC261)
Tutorial 1: Number Systems and
Boolean Algebra
For all questions show all your working in detail
1.
(a)
Convert these binary numbers to decimal:

(b)
Convert the following decimal valu
Department of Electrical Engineering
Digital Systems Design (ELEC261)
Tutorial 3 (Solution)
1.
(a)
= (. ) + (. . ) + +
The logic diagram:
a
b
c
d
e
x
y
(b)
f
.
=
. . . +
+
The logic diagram:
A
B
C
D
f
(c)
(, , ) = (0,5,7)
To sketch the logic diagram
Department of Electrical Engineering
Digital Systems Design (ELEC261)
Tutorial 1 (Solution)
1.
(a)
Binary to decimal conversion:
00010110
0001
0110
1
6
Binary to HEX
101102 = 16H
= (1x161)+(6x160)
= 2210
Following the same method:
(b)
100011012 = 14110
01
Department of Electrical Engineering
Digital Systems Design (ELEC261)
Tutorial 2: Kmapping
For all questions show all your working in detail
1.
Answer the following questions related to the function f(A,B,C,D) as defined
by its minterms below:
f(A,B,C,D)
Department of Electrical Engineering
Digital Systems Design (ELEC261)
Tutorial 4: Alternative Logic Implementations
For all questions show all your working in detail
1.
2.
(a)
Implement the function (, , ) = (0,1,7) using a suitable 1level MUX solution.
(
Department of Electrical Engineering
Digital Systems Design (ELEC261)
Tutorial 2 (Solution)
1.
(a)
f(A,B,C,D) using the MAXTERMS:
(, , , ) = (1,3,4,6,9,11,12,14)
(b)
The kmap and the minimal 2nd canonical form:
1
AB
CD
C+D 00
2
A+B A+B A+B A+B
00 01 11 1
Homework 5
(practice problem 8, Q.3)
Part (a)
EN: process
Begin
Wait for 5 ns;
EN <= '1';
End process EN;
Reset: process
Begin
Wait for 40 ns;
Reset <= '1';
Wait for 7 ns;
Reset <= '0';
End process Reset;
Part (b)
Assert (O = "011") report "an error" seve
Department of Electrical Engineering
Quiz 1
Duration: 30 minutes
ELEC261 Digital Systems Design (Fall 2015)
INSTRUCTIONS:
i.
ii.
iii.
iv.
v.
You are required to answer all questions
For all questions show all your working in detail
Write your answers on t
Department of Electrical Engineering
Quiz 4
Duration: 30 minutes
ELEC261 Digital Systems Design (Fall 2015)
INSTRUCTIONS:
i.
ii.
iii.
iv.
v.
You are required to answer all questions
For all questions show all your working in detail
Write your answers on t
Department of Electrical Engineering
Quiz 3
Duration: 30 minutes
ELEC261 Digital Systems Design (Fall 2015)
INSTRUCTIONS:
i.
ii.
iii.
iv.
v.
You are required to answer all questions
For all questions show all your working in detail
Write your answers on t
Department of Electrical Engineering
Quiz 2
Duration: 30 minutes
ELEC261 Digital Systems Design (Fall 2015)
INSTRUCTIONS:
i.
ii.
iii.
iv.
v.
You are required to answer all questions
For all questions show all your working in detail
Write your answers on t
Department of Electrical Engineering
Quiz 4  Solution
1.
(a)
Using 4 bits, numbers that can be represented are in this range:
21 +21 1 where n=4.
So the minimum negative number is: 23 = 8.
(1 mark)
(d)
Using 4 bits, a number X can be in this range: 8 +7
Department of Electrical Engineering
Quiz 3  Solution
1.
(a)
The assignment operator used should be <= instead of = as O is
an output port.
(2 marks)
(b)
The design style used is a dataflow design style as one concurrent
signal assignment (i.e. Condition
Department of Electrical Engineering
Digital Systems Design (ELEC261)
Practice Problems: Number Systems and
Boolean Algebra
For all questions show all your working in detail
1.
2.
(a)
How many bits are needed to represent decimal value ranging from 0 to
1
Department of Electrical Engineering
Midterm exam 2  Solution
1.
The correct answers:
(i) Answer (d)
(ii) Answer (c)
(iii) Answer (b)
(iv) Answer (a)
(v) Answer (b)
(1 mark/answer)
2.
(a)
The timing diagram for the D flipflop:
CLK
D
C
Q
(2 marks)
(b)
Th