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Unformatted text preview: h Name: + SSN:
Midterm ENEE 204 G] o  Due: June 24, 2004
Instructions: p... Write your name and section number at th top of each page as soon as the begun. IF YOUR NAME
IS NOT AT THE TOP OF A PAGE. YOU WILL RECEIVE NO POINTS FOR THAT PROBLEM!!! 2. Do each problem on the separate sheet provided. If you run out of space, ask a proctor for more paper. Do not
use any of your own paper under any circumstances. 3. Read each problem carefully. Write your answers neatly in a logical order. It is your responsibility to make
your answers understa idtiblc to the grader. If the r I _ . ﬂ
grader came: decipher any pan of your answer‘ you 'Braw a box around each ofyourﬁnal answer's: ‘ will not receive any credit for that part. , _
at Obey the calculator and academic dishonesty policies. All violations will be referred to the honor board.
5. If you are unsure about any question, ask the proctor for a clariﬁcation. Do not make was! 6. Bring: your student If} Witt: you to the test. ,,
Calculator Policy:
Calculators will he allowed only for algebraic trigonometric (cg. 1  .5 "‘" cos etc}. You may NOT use Lhem for any other operations. such as matrix multiplication or inversion integration, or differentiation. You must show your all work  You will not receive full
credit for problems where the intermediate steps are not written on the paper in a clear and understandable manner. ACADEMIC DISHONESTY: any ol‘the lollowing acts. when committed by a student. shall constitute academic dishonesty: CHEA’l'iNG: intentionally using or attracting to use unauthorized materials, inl‘cmiatiort or study in any academic exercise. FABRICATION: intentional and unauthorized falsiﬁcation or invention of any irifonnation or citation in an academic exercise. FACILITATING ACADEMIC DISHONESTY: intentionally or knowingly helping or attempting to help another to violate any provision of this Code.
PLAGIARISM: intentionally or knowingly representing the words or ideas oranother as one's own in any academic exercise. Responsibility to Report Academic Dishonesty Academic dishonesty is a corrosive force in the academic life ofa university. It jeopardizes the quality of education and depreciates the genuine
achievements of others. It is. without reservation. a responsibility of all members ol'the campus community to actively deter it. Apathy or acquiescence
in the presence clueadmins: dishonesty is not neutral tact. histories of institutions demonstrate that u laissearl'uirc response will reinforce, perpetuate,
and enlarge the scope of such misconduct. Institutional reputations for academic dishonesty are regrettable aspects ofmodem education. These
reputations become selffulﬁlling and grow. unless vigorously challenged by students and faculty alike. All members of the University community, students, faculty, and staff share the responsibilin and authority to challenge and make know acts of
apparent academic dishonesty. _/ Problem #1 22‘, /25
K? Problem #2 5/ ’ /25 Problem #3 c} x25 Problem #4 "T /25 if. .
Total /] 00 Section# G i O i Name: 
#ﬂ— —l ‘ /.. Problem 1 ‘ A. (10) Find the current i(t) (as a function of time]) through the 1 ﬂ resistor. Use the current
divider rule!
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~i—T‘  1 +5 YR * . i A125sin(5,000t) mA 3 1 Q A
A n»; . T— = ISE'e . I
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103* 9?.38? co5(l>ooo1' ~3tnv/q3 » B. (10) Compute the power factor for current source in the above circuit. “('KJ: ‘ H \ +kp?u§\1_{>_
VD E g Q" _ m V ( ﬂ r ﬂ C. (5) Compute the average power supplied by the current source in the above circuit.
we PM 3 TIM: \3 ens C05( ‘ﬂv‘ if) "em d. u‘ Name: ‘ Section # 63‘s 0 l
Problem 2 (25 points) r a '1; Consider a Ca} mF , capacitor. Assume any relevant initial conditions are zero. . i" 1+: 0<x<2ﬂ
A) If the voltage across the capacitor were given by: 12(1) (Volts) = {H} .
2e 23 < I Find the expression(s) for the capaciLngumpt for all times t>0. IQ = C £211? VCTCiDM“ 1‘ up {hl‘ﬂiﬁvﬁ K 1  . i . i  ! +1 3 <£ < 25,“:
B) If the current through the capac1tor were given by: i(t) (Amps): “(rm ,
'  Zak—2 23 < t Find the expression(s) for the capacitor voltage for all times t>0. c'r‘ \‘L f\ B ’m‘ m
S '3 \J': S “a >‘ Xlo _’2{?"CT $4. r.
k.» . \ un 40 ‘\ A“
a 7“}qu +6130 L'=_lea.‘_c \f/
wt)— {M I" {3 + otiéls gm 6 1e"(+23+€ as <‘i‘ J
L. .K ‘5 i5, «LC; 3x“ a; Pcmﬁe/ ,,,A_.‘.»o"“ C) One of the above two scenarios is impossible. Which one is impossible and why? it? son1.3. {‘ {57:} Av 15 i‘hnpoecﬁ; :‘l V 1'.” 3 11.3: 2 Ii" +F ‘
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'\./ E _y= .. Mot F Name: Sectic‘a
""—‘_“‘“_—ﬂ—'—— ‘ Problem 3 (25 points) ,_
Censider t. e circuit shewn belew. First ccmbine azw series garallel ngegjye agreegzigms 2M re4raw the w “.1 lg; “1n. AA»; circuit in the “phasor domain”. Then label the nodes and meshes and write a complete set of KVL and
KCL equations ’50 salve éhe sine aide}, steadystate emblem. Cheese referee3e curren’is ﬂowing leftto right or. downtoup and use impedanceﬁ in the C
 ' «ﬂew.
equations  GT" \ ‘ \ ‘ \ 1‘ 3 ~ '\.
{omech‘ohi ' (Scﬂefb ‘“ ger'FE’ W'H‘ Pgrgg'ex Cmr‘c‘t’rm“) \ A A '— A
1' + Tom—Izzg~O 63‘ ecu:6
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\ I323+1222 +Vo —0 it) IKJ‘IBh,‘ C3
in, ‘f‘: 1" A A w
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V0+I " C) \V I5 I? H n 9 wt) 1: wre’le QAJQ‘IJrl‘k‘f‘rcj I‘V’ﬂ .. — ’ rd" 4
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7 C’frné. :72 7/
~— __ Section# 0 f O I ' r2/  /. Problem 4 (25 points) 4/ \
Con51der the c1rcu1t shown beiow. Find the unknown voltage Vo(t). Remember to show ALL your
work. mm‘me ...
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