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(ELEC101)[2010](f)quiz~2407^_10272.pdf
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1. Use mesh nnalysisto find the cUTfentloin1h~ l;>elpw nei:t\vQtIc



J 'Ct +-.,l( t1-:tt-) of 1+?:l -). :;> D P-t_. J.. 7-).1:: #._ ~CL)
l
;) Z)-f-if-4 }...fl:~ -I-..2 lJz :Z:., ) ~ C -;;:z." -f ~'Z}-'=-~ -0 if <(1)" ~ ).."t,. -J%) ..~. J

2. Use the principle of superposition to1nd the voltage Vo in the below circuit.
12A


20


+
8V
4Q
60
Vo
-
-



3. Use source transformation to find the current 10 in the below circuit in tenns ofIs and R. R R

R
R
R

...
;i, (Z-
"5
.....~_....._<-_....
.~.~+ \2 l'
1 \"'. ,

4

4. Assume the op amp is ideal. Find the voltage Vo ofthe ampUfiet structure shown below.
40
9V 0---'11111,...-...."
120 600 30n

6V 0---'l1I,1Ir----I
360 >----'0Vo

\/ ,. If ( (2.) / (:).. 1 '( 0. I b j--. t '1 "'"--) I{tf I.J6 "\ 1f-
V
t-


5. Assume the op amp is ideal. Find the voltage gain VoNs of the amplifier structure shown below.
40kO
20kn 30k.O

(, ':\d,,\u,\; ~ \..\r.n.
V't\ -0 O-Vo
_.. . -:::;
.~
~O ~ ~,~.

\rA --u
-,-
lc\..c:-~
~VJt -f ~S ~ u:VA -+ Vir -Vi'~ ::.. 0

\=3 VA"" t VS'" V() ,... (>


_.L'i \Jo -~V$'" Vo~' 0
"3
) \b)
-\{V~ ~ vo l (k ~ \=-Vb( ~
-) ~. -\t! ~ .. \-\,~-:8
-
6. 111e circuit below contains a current~dependentcurrent~sol1rce. Find (;Urrentil.

~vl ~ \. tT'Tt
0":'\4-.. ~ \'s ~ t+ t 0(" t-~ ') +-'-;( l.lot", )""-0 \S~t of \OAl -~e. -+ l1~"0 ~~~ \ '= be
-t,' ~:A-~
7. (a) Find the Thevenin and Norton equivalent circuits with respect to the terminals a, b for the below circuit. I.e. Find VTH, RTH and IN, RN.
2A
so
r-------'II/I/II~--__;... }-----...,

20
3V

60

b

"2 1-t ... 2(.1A .r14-I.f -8 ~ 0
_').VA ~r .:, V~ ;7: I:;...

I .f.' .'~
.-Vr.> r -S ,16 ~;;. .,.


8

(continue)
7. (b) Draw the Thevenin and Norton equivalent circuits found in part (a).
I\'J?IY~ ~;.~,,,,..J..I,,:::(-:,
[f4VJ.W'"" "8:~~.:.v""~,,.r:
'..
.
~
I
?,tI~
'J
8 Z--.-L---*,
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