This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: UCLA Department of Electrical Engineering EE1O Midterm 2 Spring 2011
lnstructor: Prof. Gupta May 18th, 2011 1. Exam is closed book. You are allowed one 8 1A; x 11” doublesided
cheatsheet 2. Calculators are allowed. 3. Cross out everything that you don’t want me to see. Points will be
deducted for everything wrong! 4. Do NOT use Laplace Transforms to solve any problems. Name: 1
Student lD: 5 C5 [Wt/“tom
Student on Left: Student on Right: Student in Front: Problem l Maximum l Your Score
“1 Score
1 1O
’ 2 ” 6 W"
W 3 t“ 8 r— ,
WWMZMWTWMS wwwww WWWWWWWWWWW “w!
“’“féigi ““““““ m4 ‘‘‘‘‘‘‘‘‘‘‘‘‘‘ 35 iiiiiiii Mm “ m mm mm} Q1. (10 points) The switch in the circuit below has been in position A for
long time. It is switched to position B at t=0 and back to position A at t=1 ms.
Find R1 and R2 such that vc(1ms) = 8V and vc(2ms) = 1V. vi» : r in a '
eimﬁ M Kg «2,? R1 ; Eggenneaw 2.2g £153 "2» E e "as— LBZ * q "5" 1w Q2. (6 points) A long time after the connections have been made, find out
the value 0va if there is a Capacitor is present between x and y. 2mg V. Wig: Q3= (8 points) For the circuit of Fig. below, the value of the inductance is 1250 mH. Determine v(t) if it is known that the capacitor initially stores 390
J of energy and the inductor initially stores zero energy. l
CV1: «L L" ‘
“a 360.0ng _ 3010 J) Vdoq zl/Cwﬂ: 10% $1104 a zCiio’r) % O
From KCL) )5 CW 4; l, ,r
140.053; [JESOVJtzO 37 £)+o.os°wco)+,l— 3.. «it “"5
U $002+)
“Elam
:23 Q at“) v dl)
(if) lbdt l—lév o
gl+iog+i620 6:13,: 61)“?
vm: kt 8di+ 218"“
V 2  W m
can \4‘ +1“ 3.04m 2:) :3?qu aiééy
$160+) rm
WK :2 mlkt”gk13m1®8~lgﬁ kir~3§2f§giﬂ ﬂZH‘é Q4. (6 points) You found a rather strange piece of circuitry which three
exposed terminals (x,y,z) and it has exactly one resistor, one inductor, and
one capacitor, but you don’t know how they are connected'The resistances
(measured by applying a 1 V DC source) between theterminals of the
mystery circuit are as follows: I , _ x  y: infinity, y — z: infinity, 2  x: 10 Draw all possible connections of the three elements with x, y, 2 clearly
labeled which would satisfy above. No points given without explanations. SWe the (assumes are Measured by apply‘bb a W DC
Swine ) the mama/Vices O‘QQCQFXC‘CCOY‘ and cm ‘ci/tclucCoY‘ are
inl‘mm/ and 29m, msFecc‘uély. 1' The capable/r has, 10 be placeé between “(by and W2, but Mot beth Z’Q’.
CL. The Y‘es‘cS'Cw' has to be plated befou€em 35%. CW these {boo cmd‘ctéms, we cam have. “tch possible: Comp 805s mg ; WﬂWwJ‘ EM
QC 2 y szww"mwi§r~w“%
9r 1% 7 ...
View
Full Document
 Spring '07
 Chang

Click to edit the document details