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4 Solved Questions on Electrical Circuit - Midterm Exam 2 | EE 261, Exams of Microelectronic Circuits

Material Type: Exam; Professor: Inan; Class: Electrical Circuits; Subject: Electrical Engineering; University: University of Portland; Term: Fall 2003;

Typology: Exams

Pre 2010

Uploaded on 08/18/2009

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University Jf PJrtland
SchJJl Jf Engineering
EE 261-Electrical Circuits-3 cr. hrs.
Fall 2003
Midterm Exam # 2
(Monday, October 27, 2003)
(Closed Book Exam, Two Formula Sheets Allowed)
(Total Time: 55 minutes)
Name:_______________________J
Signature:___________________ J
An honest mind possesses a kingdom.
Lucius Annaeus Seneca (4B.C.65A.D.)
Honest people are the true winners of the universe.
Anonymous
pf3
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Download 4 Solved Questions on Electrical Circuit - Midterm Exam 2 | EE 261 and more Exams Microelectronic Circuits in PDF only on Docsity!

University J f P J rtland

Sch JJ l J f Engineering

EE 261-Electrical Circuits-3 cr. hrs.

Fall 2003

Midterm Exam # 2

(Monday, October 27, 2003)

(Closed Book Exam, Two Formula Sheets Allowed)

(Total Time: 55 minutes)

Name:_______________________ J

Signature:___________________ J

An honest mind possesses a kingdom. ” Lucius Annaeus Seneca (4B.C.−65A.D.)

Honest people are the true winners of the universe. ” Anonymous

NOTE: On all the problems, please show all your work, and provide the appropriate units for your answers. Also mark on the schematic to show any currents or voltages that you define in your solution.

  1. (25 points) Find the node voltages Va and Vb in the circuit shown below. (Answers: Va= −2 V and Vb=2 V.)

3 Ω

2 Ω 2 A^ 1 A

ix

a b

4ix

  1. (Total: 25 Points) Consider the circuit shown below.

15V 1 5 kΩ

5 kΩ 2 0 kΩ

R (^) L

4 kΩ 3 mA

(a) (15 Points) Determine the value of the resistance R L so that R L absorbs the maximum possible power from the circuit. (Answer: 14 kΩ.)

(b) (10 Points) What is the maximum power delivered to R L for the value of R L found in part (a)? (Answer: ~4.018 mW.)

  1. (Total: 25 Points) Assume that the circuit shown below has reached steady state before t =0. At t =0, the switch closes.

5 mA 2 kΩ^ 10 mH

t=0 s

10 μF

+^ i(t)

v(t)

8 kΩ

(a) (7 Points) Find i ( 0 +). (Answer: 0 A.) (b) (6 Points) Find v ( 0 +). (Answer: 10 V.)

(c) (6 Points) Find i (∞ ). (Answer: 0 A.)

(d) (6 Points) Find v (∞ ). (Answer: 8 V.)