ECE 300Spring Semester, 2007

Test #1a

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wlg Test B

3 A

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Name l,t')l tPrht (last, ftst)

Work the exam on your otrr engineering paper, Work on oue side of your paper ody. Attach yourwork to the back ofthis exam sheet and staple in the top left hand coriei tacn proftem ZOZ.(l) You are given Lhe circuit olFigure .

(a) Use mesh aaalysis to find the curents il, ir, i3 ard ia.(b) How much power is supplied by the 24 V souce?(c) How much power is dissipated by the 3 C) rcsistor?

4 ( l

;l4 0

/ ' tk/ r )/,-/

i\. )1. /

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a- 2+ + + 4/ , /n'- e a 1,,>-2'4) /2(_i, -;,) =D

/ hr', ] /tz - a)z -?t+ _ pt' |

l lB

/ (z'+-4) * A1a'q-../") /1 / 4)4. =' o

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Zt rz ' /- aont y' r. a.n L

)r- ' / ' . : 4

:), +,4'>. o ut)s / D4/ = +ll - r

-/t 1 = * -<-

bL'-2/. -a -J

*/ /oo0/

, . t t '=-0,4 77 A

-)" = - AQ

-1fr-1 f 1-'lll, I l2rl? ll), I l-n lD ll'al I+l

l i / | I - l2 l l '1 | l- - l

) - )

./- -j,sx fr

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(2) Use any method ofyour choice to answer the following questions about the circuit ofFigure 2.(a) Detemine the voltage V. as shown in Figure 2.(b) How much power is absorbed by the 1 0 C) resistor shown in Figue 2.

Fttul ,-, e o ttta,Q/,nozQ< va /y'aj z,

/h(1&U).L, 1(

a, fu",t rt a4

12V

1 )vx.

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/Vr -RVot,

5Yx - /D

t,1

/J-v- /./a

u/ -)2

Vo t)Vs I

V, / v, - /a :t) /6, =' /z- V x

5 vx -/o ft= - vr)

28V' /?a174 yo ,= €.57 v

Iy : !:4-

Vn I P,Ur = /2a/>7a

2

(3c,

i:"02Yo t2v

Va ln e29 /Jzo/r+i"

4l ,4, .d, €?t-V>:o

-?l/o /42', r la,/z)-z'r)=o

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/l ///

/ ,,{ Vb

?2,/b ,, /

/ l 8,, .Dt zttoV> =a

lo 1;,-,',) / 3)z / /e = o

/-:t'),--/ /;;;-: :;;j-G--"ti,l--r -l/ll,l=J\L"'," t7 )L',-) l-',)

(3) Use any method to find the voltage Vab in the circuit ofFisme 3.a

l t /Ur. n0P4j / / , ^4 /q+,3 z- .2

)

5vx-/5o * /o)t,-7oo

lTvx = )/o, l/, = )2,7aV

A?t/, LYL, 2 r;rn>'. oYqb * 2o * !r:e>

/,rrp

Uy / 2a

1/x

t t a l ) / 40 *a(

a / 'W .e/

Vqb = -3o-,Vx - -Jr , j ; - /

(3) Use any method to fiad the voltage V"1 in the ctucuit of Figue 3.

'Ltar-g ,nae h azz<1rae,Z

- /,J i'v2/ ea L, ol

7C

fo- -,'1[),] @1| -,, "" \Lu,J= L=.)

),: a.t6a tr )2.. p,L4

v tL y' 5o) z = a

1 ft ar<

(4) Find R€q for the circuit ofFigue 4.

7r,

f/a,rl"Y rf /ho/a// b

/ta zt 4 -.

, ,r '3 t4-

/=

/rtb

/2-

/2-Llv

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lko-

AnP

t-I t2

g++

1z l\

41\

*4-

- \a- t q / L

2+ -'b

(5) You are givel the circuit ofFigwe 5. Use any method to find the voltage v2.

r {'1", L$

+-v?5

u-J.-nJ'---Vx

-A\o t

- 2 Y >--

\J z = *

2'r- -a\---o

rl o

t\l

^ap

Vr- - ' lo -"X\--olo

(6) This problem is lor exha credjL. pan (a) is lor I poinr. pan (b) is for I poinrTherc is no partial credit given. Itr each case, thi answer is eitirer

"o.r"ii o, oo,

"o,'"",.(a) Find tlle voltage V"b indicated in the diagrarn ofFigure 6 (a)

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Vut: i{5xto \ovIrtS

(b) Giye the value ofthe current Ix ir the 12 Q resistor, up to the second signihcant decimal place,for the circuit shown Fieule 6b.

l0o rx

I

1 M O

, l ,l.

rn-> ,Q5 v(0

2. j-'[', J

r/.( l t1--

^l r\".-J

9,rso - '-

+Jof'2u"*-'