ECEELECTRICAL and COMPUTER ENGINEERING DEPARTMENTUniversity of Utah

              ECE 1270 - Introduction to Electrical and Computer Engineering

      Study Guides      Homework      Communications Assignments      Labs      Matlab      Practice Exams      

Instructor                            ECE
Dr. Angela Rasmussen
Email: ece1270@comcast.net
Office: MEB 3254

Syllabus and Schedule

Course Procedure (grading, notebooks, reports, etc.)

Notes

Review for Unit 1 - pages 56-59 of notes

Example from Page 174

Learning Objectives/Study Guides                            ECE

Homework                            ECE

The following is NOT free from errors!  Please email me if you find discrepancies in your work after triple checking it.

Homework

Modifications

Answers:

Due

 

 

 

 

Problem Set #1    Solution

 

1.  ix=+8/13, i2=+40/13, V=-80/13; p_10=640/169, p_2=3200/169, p_20=320/169, p_4A=-320/13; 2.  i1=-350/329; i2=-120/47; Vo=350/47; 3.  vx=1/2V, i1=3/2A, power=9/4W

W, Jan 16

Problem Set #2    Solution

 

1. 9V 2. -8A; 3.  v1=-(Va+ia(R2+R3))*R1/(R1+R2+R3); 4a) i2=alpha*Va/(1+alpha)R2, 3b) power=(alpha*Va)^2/(1+alpha)^2*R2; 5.  Vo=IsR3(R1+R2)/R1

W, Jan23

Problem Set #3    Solution

#4 should read “find the power dissipated by the dependent voltage source.

1.  i1=-26.4mA, vo=-39.3V; 2.  Vx=-1.5, Vy=3.25, power=225mW; 3.  V1=12, iL=-0.5A; 4.  i2=1A, i1=-1.1A, power=+0.55W

F, Feb. 8

Problem Set #4    Solution

 

2.  Rth=R1/(alpha+1), Vth=(Vs+IsR1)/(alpha+1); 3. power=12W (absorbing)

F, Feb. 8

Problem Set #5    Solution

 

1.  R1=1.11k, R2=794; 2.  i(t)=-3.33m+10.83me^(-t/24m)A; 3. vc(t)=-40/13e^(-t/1.54) V; 4.vo(t)=5/3+55/3e^(-t) V

M, Feb.25

Problem Set #6    Solution

 

1 energy=32J, 2 vo(t)={-8-4e^(-3t/2sec)}V; 3a) Vc(t=0+)=IsR1, 3b) Vc(t>0)=IsR1-Vs+Vse^(-t/R1C);      4a) RL=14/9ohm, 4b) power=10.3W; 5.V1=-VsR1/(R1+R3) + (-isR1R3)/(R1+R3)

M, March 3

Problem Set #7    Solution

 

1.  Zab = 109.45(e^j354.8); 2. w = 447.2 rad/sec; 3. I=8e^-j0.0083; 4. i(t) = 0.936cos(10kt+40)A

M, March 31

Problem Set #8    Solution

 

1.a)  -33/50+j89/50; b) 2sqrt(5)e^(j93.4); c) 5e^(-j110); d) -1/4; e) 0.16; 2.  L=27.3H 3.  Io=10mA; 4.  Vth=4); Zth=sqrt(2)ke^(-j45) 

M, April 7

Problem Set #9    Solution

 

1.  Vo=Vs-is(R3R4/(R3+R4)) 2. a)  R1=any real + value, b) is=0.2mA, c) Rin=R1 (any value that is +) 3.a)Vth=10V, Rth=250ohm; b) RL=250ohm, c) power=0.1W

W, April 16

Problem Set #10    Solution

 

1.  C=4.04microF, V1(t)=constant +6V, 2.  V2(t)=12e^-t/1k*C, V3(t)=> +12V(Vo=+12V), -6V (Vo=-12)  3.  I1=5mAexp^(-45), i1(t)=5mAcos(52t-45) 

W, April 23

Problem Sessions                            ECE

Communications Assignments                            ECE

·  CLEAR Center:

·  Writing Assignments:

 

·  Writing Center Help:

            University Writing Center:

  • Location: 2nd floor of Marriott Library.
  • Phone # to make reservations: 587-9122 581-8715

            Clear Center

  • Location: 1706 WEB
  • Phone #: 581-8715

·  Oral Presentation:

  • Oral presentation order (handed out in class only)

Labs                            ECE

Matlab and Labview                            ECE

Practice Exams/Solutions                            ECE