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ECSE 2010 Name:
Electric Circuits
Exam 1
Spring 2011
One eer
—_—
Problem Pts. Score
No.
1 20pts
2 20 -
sa
3 ts |
Pr
4 15pts
5 20pts
6 15pts
Total 100pts
Show work for partial credit, Include units for all answers. Name: Se Jw
Problem 1 (20pts)
Hl al
——> ;
AN AM
.| Wt 4k 3k +L v4 Re
q
= 6k = 2k s 2k =
- R5
J —
=a Ne =o
akiprh adh
4
Resistor values are in Ohms.
a) Find the value of Req so that both circuits are equivalent in terms of
V1 and Th. (10pts) Include units for all answers.
% V wht, kr
/
Lh 1 Rea
ee al
RY
Show work for partial credit, Include units for all answers. Name: ae ln
1G
Problem 3 ts) a v
f
& 4 megh@e ~ [ Care tinh soon
cr a
?
oS 62,
a) If the circuit show is solved using Mesh Analysis: How many mesh equations are required? If
it is solved using Node Analysis: How many node equations are required: (2pts)
wy
# of mesh equations = 2 # of node equations = 2
b) Set up this problem to be solved by either node analysis or mesh analysis. Label the diagram
above with either the unknown node voltages or the unknown mesh currents. (2pts) Mod
Ore
c) Write the node or mesh equations consistent with your labels in part b). (4pts) } er ae
#2 Jy
i
4
d) Solve the equations and then determine V, and |, consistent with the polarity marking = —
given. (7pts)
Additional space is available on the next page.
Vr~ vrs, © hs - 0
=
+
~
5 —
Show work for partial credit, Include units for all answers. Name: Ay) Fits
Problem 4 (15pts)
d----47---->
AW
2k
= 3k
©
6Vdce\>
= Rload
= 1k
i
"
Source 11 toad
Network 11 Network
i
(10pts) .
Find Vz, Ry, and Iv You'may use two of the result$'to calculate the third. Included units.
er Yr LY eA ON |
ora Vrhevenin Lov
+] 77° 2 bo (Ov ‘ene 2.9ohs
oe be “ye 44 . Weer Ih SA
_— fmmen Tye Ye fa, 200
| Ire Os
4
b) Draw the Thevenin circuit. (3pts)
t
; w : T+ A L
( Ms i ? oh ated
1 — ) ft. — Oe
c) What value of Rload will result in the Maximum power transfer into the load?
/, ey a yx (2 = 2. 2SKA Rload = aH. 2S
Wrox bea {
Show work for partial credit, Include units for all answers. Name: oa
Problem 5 (20pts)
if ° A
Vw t Node #h
- VK + -2 Vout
4k —_—— 4 :
|
AMV AMV
2k 4k Vout o
2 2Vvx 3k
Ee ° a
0 aeb
Font = = SY
Ow 9
a) Determine the Thevenin equivalent circuit parameters for the circuit above. Assume a load
circuit will be connected across the terminals labeled as Vout and find the Thevenin values
looking back into the circuit. (17pts)
Note: V3=2V
Find V+, Rr, and ly You may use two of the results to calculate the third. Included units.
Re -~ Yr > Dad, Ye A KO
éc
Vrhevenin
_— / * ’
\ . ig Rthevenin
} / 2 Et
oA " | Inorton
| 2 Sas)
- <a “tt
| , } } -
| | wy
bo.
L Ve
{ AG “=
Le \ 3
\ _ Use
/ ¥ t t° Ves, @, :
——~ a ao RY alt
~~ ‘ Tt
\ . Ux “ae ‘ \
aa. i. 1S? Cee 4 Law
Je 7 / es ‘
“=<—-b) Draw the Thevenin circuit and label the values: (3pts)
by. bere
Tae 4 nt Sat
Ap .
