ECEELECTRICAL and COMPUTER ENGINEERING DEPARTMENTUniversity of Utah

              ECE 1270 - Introduction to Electrical and Computer Engineering

***Current Grades***


      Study Guides      Homework      Communications Assignments      Labs      Matlab      Practice Exams      


Instructor   TA

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

Office Hours:  R 9:30-11am

  Shomit Das
Email: das.shomit@gmail.com 
Office: MEB 4504

Office Hours: R 11-12

Syllabus and Schedule

Notes:

On the following practice examples for the final, use R_T for the op-amp problems as a symbolic value and solve for  an equation for Vo.  Ignore other parts to that particular problem.

Final Exam Practice #1

Final Exam Practice #2

Final Exam Practice #3

Final Exam Practice #4

Final Exam Practice #5

 

 

 

 

 

 


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

Solution for #6

 #8.  Find ia instead of i1.

1.  i1=7.5A, i2=2.5A, i3=2.5A; 4.  Ix=2.5A; 5.  I1=8A, I2=2A; 6.  Vc=50V; 7.  i1=(iaR2+Va)/(R2+R3); 8.  ia=-Va/((1-alpha)R1); 9.  i1=250mA, i2=150mA, i3=100mA, Vo=1.5V, p_24ohm=1.5W, p6V=-3W; 10.  i1=6A, i2=3.6A, i3=2.4A, Vo=31.2V R, May 28

Problem Set #2    Solution

 #10.  Remove vs source in circuit.  Answer should also be +is(R1+R2) and the solution should have

+is+I1=0 instead of -is+I1=0

1.  i1=2.5mA, 2.  V1=6V, 3.  Req=10kW, 4.  i1=(vs+isR2)/(R1+R2+R3); 6.  V2=(iaR1R2)/(R1+R2-alpha); 8. i1=(iaR2+Va)/(R2+R3) ; 9.  vo=-isR3(1+R2/R1); 10.  vo=-is(R1+R2) R, May 28

Problem Set #3    Solution

 

3.  i_8k=-3.125m, i_10k=-2.5m, i_5k=-0.8m, i_6k=-2.5m, i_2k=3m, i_7k=-0.43m; 4.  (a) 1A, (b) -1V, (c) -1A; 6.  i1=4A; 7.  Ix=100mA; 8.  v1=0, v2=28, P=-18W; 9.  v1=2, v2=20; 10. vb=9.3, ve=8.6, iL=20mA T, June 9

Problem Set #4    Solution

Solution Last Page

#2.  Find Vx.   

#5.  Determine the power in the dependent source if RL=2k ohms.

#6 should read V2 instead of R1 at top right node.

1.  i1=2mA, i2=1mA, i3=2A, 2.  Vx=108.6, power=72.3W, 3.  Vth=-2V, Rth=3ohm; 4.  Rth=36/17, Vth=8V; 5.  power=2.5mW; 8.  Vth=isR2, Rth=((1+alpha)R2+R1)/(1+alpha), 10.  power=-60mW T, June 16

Problem Set #5    Solution

 Uploaded new file for homework.  #3 should read -12+12(1...) instead of -12 +2(1...)

1.a) 0A, (b) 420e-6A, (c) 5me^(-t/2e-6); 2.(a) 0, (b) 90pV, (c) -480pi*sin(2pi*5*t)microV; 3.  t=6.93e-6; 4.i_L(t)=1/L*(6t-100m(e^(-t/50m)-1); 5. v_c(t)=3e^(-t/9ms)V; 6. i_L(t)=3me^(-6t/5e-6); 7. vc(t)=15e^(-t/6m); 8.(a) v_c(t)=9-3e^(-t/10m), (b) wc=31.2e-6J; 9.(a) i_L(t)=900e-6+[6-900e-6]e^(-t/0.1n)A T, June 30

Problem Set #6    Solution

 

1.  i1(t)=-30micro(e^-t/150nsec)A, 2.  V1(t)=40/3(1-e^-6t/16msec), 3.  i1(t)=1me^-t/1microsec, 4.  i1(t)=0, 5.  V=isR2+(alphaVsR2)/(alphaR3+R3+R4), 6.  wL=30pF, v(t)=0.24+0.96e^-t/10microsec, 7.  Vc(t)=is(R2R3)/(R1+R2+R3)+[isR3-is(R2R3)/(R1+R2+R3)]e^-t/(R3||(R1+R2)C, 8.  RL=15k 9.  power=60mW, 10.  i=(alpha(vs+isR4))/(R1+R2)(R3+R4) R, July 2

Problem Set #7    Solution

 

2a.  0.3520-j0.936, b. 2e^(-j30), c.3e^(j150), d. 10, e. 2 4.  3.8+j0.6, 6.V=120e^(-30), 7.  I=4e^(-39), 8. V=120, 9.  I=8e^(-j0.473), 10.  i(t)=0.936cos(10kt+40) T, July 21

Problem Set #8    Solution

 

1.  R=30k or L=1.2H, 2. (R=30k):  Io=3sqrt(2)mA, (L=1.2H):  Io=12sqrt(2)mA, 3.  L=2.3microH, 4.  Io=5.2A,   6.  Vth=5, Zth=1.25k-j3k,  8.  Vth=1kV, Zth=50sqrt(2)e^(-135),  9.  Vth=4sqrt(2), Zth=sqrt(2)ke^(-45), 10   L=27.32H, Io=10mA R, July 23

Problem Set #9    Solution

 

1.  Vo=-is1R2+is2*(R3||R4)*(1+R2/R1); 2.  R2=-100k; 3.  Rin=R3||R4; 4.  Vth=2.2, Rth=200; 5.  RL=200, Pmax=6.05mW T, Aug 4

Problem Set #10    Solution

 

1.  a=C=26.5nF, b=R=3k; 4.  Vab=3e^-j60degree; 5.  Vab(t)=3cos(500kt-60degrees)V T, Aug 4

Problem Sessions                            ECE


Communications Assignments                            ECE

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·  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:


Labs                            ECE


Matlab and Labview                            ECE


Practice Exams/Solutions                            ECE