EE 250 Winter 2010 HOMEWORK 2
University of Alberta Instructor : Karthik Shankar
(The ten problems are arranged in order of increasing difficulty. Make sure your answers show the work in solving the problem. If the final answer is wrong, partial credit wi
EE 250 Winter 2010
University of Alberta HOMEWORK 3 (due Monday Jan 25th, 2010) Instructor : Karthik Shankar
(Make sure your answers show the work in solving the problem. If the final answer is wrong, partial credit will be provided if the work is shown t
EE 250 Winter 2010
University of Alberta HOMEWORK 3 (due Monday Jan 25th, 2010) Instructor : Karthik Shankar
(Make sure your answers show the work in solving the problem. If the final answer is wrong, partial credit will be provided if the work is shown t
EE 250 Winter 2010
University of Alberta HOMEWORK 8 (due Mar 8st , 2010) Instructor : Karthik Shankar [10 POINTS]
1.
2.
[10 POINTS]
3. Find the Z-parameters of the two port network in the figure below:
[10 POINTS]
4. Find the Y-parameters for the circuit
SOLUTIONS TO HOMEWORK 1 1. i = 530 A v = 25 108 V
2. iC = 28.27 cos(45 t + 18) mA iC = 28.2718 mA
3. vL = 82.87 sin(350 t + 80) V = 82.87 cos(350 t 10) V vL = 82.87 10 V
4.
vL = L Wmax di = 50(e 5000t )V dt 12 = LI max = 25 mJ 2
5. Energy dissipated in th
EE 250 Winter 2010
University of Alberta HOMEWORK 7 (due Mar 1st , 2010) Instructor : Karthik Shankar
1. A series resonant circuit has a Q of 120 and a resonant frequency of 10,000 rad s-1. Determine the half-power frequencies and the band-width of the ci
EE 250 Winter 2010 University of Alberta SOLUTIONS TO HOMEWORK 2 Instructor : Karthik Shankar (The ten problems are arranged in order of increasing difficulty. Make sure your answers show the work in solving the problem. If the final answer is wrong, part
EE 250 Winter 2010
University of Alberta HOMEWORK 5 (due Monday Feb 8th, 2010) Instructor : Karthik Shankar
(Make sure your answers show the work in solving the problem. If the final answer is wrong, partial credit will be provided if the work is shown to
EE 250 Winter 2010
University of Alberta HOMEWORK 5 (due Monday Feb 8th, 2010) Instructor : Karthik Shankar
(Make sure your answers show the work in solving the problem. If the final answer is wrong, partial credit will be provided if the work is shown to
EE 250 Winter 2010 HOMEWORK 1
University of Alberta Instructor : Karthik Shankar
1. Convert the following into phasor form :
i = 5 cos(45t + 30) A v = 25sin(32 t 18) V 2. Find the current flowing in a 50F capacitor if vC = 4 sin(45 t + 18) V . Give your r
EE240-A2-2010
Assignment #2
Due October 4, 2010.
Problems 1 to 4 are for practice only do not hand in solutions for these
but keep them to compare with the solutions posted later.
Only hand in a solution for the problem at the end.
1. Find V0 in this circ
EE240-A2-2010
Assignment #6
1. Find the average power supplied by the
source.
SOLUTION
2. Find the average power supplied by each
source by determining both the voltage and
current for each . Check that the power
absorbed in the 1-ohm resistor equals the
EE240-A2-2010
Assignment #7
1. In this industrial situation, find the power factor
of the load accounting for power lost in the line.
RLINE = 0.1
Load
40 kW @
240VRMS
Power Co.
44 kW
2. In this industrial situation, the load power
factor is 0.8 lagging. F
EE240-A2-2010
Assignment #4
SOLUTION
1. Maximum Power Transfer Problem:
Find the resistor RL for maximum power transfer and the power absorbed in it. Use the
Thevenin Equivalent Circuit approach.
1. First find the open cct voltage, VAB.
Note the current t
EE240-A2-2010
Assignment #3
Due October 13, 2010
Hand in detailed solutions to problems 1 and 2 for marks.
Practice problems with solutions will be posted in the course wewbsite.
Make sure you use the REAL EE240-A2 Cover Sheet!
http:/www.ece.ualberta.ca/~
EE240-A2-2010
Assignment #2
SOLUTION
Variable Current Motor Controller
The problem is to design a variable current divider (as in the circuit diagram
below) which varies the current in a 10- motor between 0A and a maximum of
f*200mA where f is the same fr
EE240-A2-2010
Assignment #1
SOLUTION
Power-Limited Voltage Divider
The problem is to design a voltage divider (as in the circuit diagram below) in which the
output voltage is a predetermined fraction, f, of the supply voltage, 12V, and the power
drain on
EE240-A2-2010
Assignment #8
1. A single-phase, 3-wire, 60-Hz
circuit serves three loads as shown
to the right. Determine IaA, IC, InN
and the energy use in kW-Hrs over
a 24-hour day.
2. Find V0 in this network. Use the
dependent source method.
3. Find V0
EE240-A2-2010
Assignment #7
1. In this industrial situation, find the
power factor of the load accounting for
power lost in the line.
Due November 24, 2010
2. In this industrial situation, the load
power factor is 0.8 lagging. Find the
amount of power abs
EE240-A2-2010
Assignment #6
1. Find the average power supplied by the
source.
2. Find the average power supplied by each
source by determining both the voltage
and current for each . Check that the
power absorbed in the 1-ohm resistor
equals the total sup
EE240-A2-2010
Assignment #5
Due November 10, 2010.
Each question is worth 2 marks.
Make sure you use the REAL UPDATED EE240-A2 Cover Sheet!
http:/www.ece.ualberta.ca/~mcmullin/EE240-2010/EE240-A2-Cover_Sheet.rtf
1. Use the supernode
technique to find I0.
EE240-A2-2010
1.
Assignment #5
SOLUTION
Use the supernode technique to find I0
1. CONT'D
2. Find V0 by Mesh Analysis
2. CONT'D
3. Use Norton's Theorem to find I0. Treat the 2
resistor as the load.
3. CONT'D
Find the short-circuit current by superposition.
EE240-A2-2010
Assignment #4
Due October 20, 2010
Hand in detailed solutions to problems 1 and 2 for marks.
Practice problems with solutions will be posted in the course website.
Make sure you use the REAL UPDATED EE240-A2 Cover Sheet!
http:/www.ece.ualber
EE240-A2-2010
Assignment #1
Due September 24, 2010.
Problems 1 to 4 are for practice only do not hand in solutions for these
but keep them to compare with the solutions posted later.
Only hand in a solution for the problem at the end.
1. Determine the pow
EE 250 Winter 2010
University of Alberta HOMEWORK 4 (due Monday Feb 1st, 2010) Instructor : Karthik Shankar
(Make sure your answers show the work in solving the problem. If the final answer is wrong, partial credit will be provided if the work is shown to
EE 250 Winter 2010
University of Alberta HOMEWORK 4 (due Monday Feb 1st, 2010) Instructor : Karthik Shankar
(Make sure your answers show the work in solving the problem. If the final answer is wrong, partial credit will be provided if the work is shown to
EE 250 Winter 2010
University of Alberta HOMEWORK 6 (due Monday morning 10 am Feb 22, 2010) Instructor : Karthik Shankar
1. The midterm exam is on Feb 22, 2010 at 5 pm during the seminar. Please turn in this homework in the class earlier that morning (Feb
EE 250 Winter 2010
University of Alberta HOMEWORK 6 (due Monday morning 10 am Feb 22, 2010) Instructor : Karthik Shankar
1. The midterm exam is on Feb 22, 2010 at 5 pm during the seminar. Please turn in this homework in the class earlier that morning (Feb