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midterms_section1_2

# midterms_section1_2 - ELECTRICAL ENGINEERING DEPARTMENT Cal...

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Unformatted text preview: ELECTRICAL ENGINEERING DEPARTMENT Cal Poly State University San Luis Obispo EE 112-01 5 Winter 2008 Exam] _Name SQ LA [3 t7 m Show All the Details In The S ace Provided ‘ Problem 1:30 Pts.) In the following circuit, a) Find the current Ix. Roi... A: 10-: e‘x+(,'=-:>L=10«Lx tuL our: Iat'xdsW'x-WT‘" 5l‘xa'S‘U0 42‘)?” {u 1.x ”f0 =0=3W “= 5”" b) Find the ﬂower genetated by the dependent-scarce. 'ﬁeui U=§ixvl§V.* ? i . I L (0 —-Lx:§ﬁ Problem 2(30Pts.[ In the following circuit, 3}} Find the equivalent resistance across AB terminals. .14 Ar 5:431?” 'l<\/" '. Q} Find the input current, I. 9) Find the current Ix, l . 9,373» Problem 3 {40Pts.[ The voltage across and the current into a device are shown. a) Calculate the charge q at t: 5 sec. b) What is the power absorbed by the device at t= 2 sec. ﬁL-{f U [I‘Lly) (-5): (or!) @ e) What is the energy consumed at F2 sec? (,4 LT)“ Jﬂ‘LlMll' ﬁwrb 1234567 Electrical Engineering Department Cal Poly state University San Luis Obispo EEl 12-01 Winter 2008 Exam 2 A.Naﬁsi - Results Must be Shown in A re riate Matrix Form Be are bein Solved Box all answers. Problem 1§50 pts.[ You are told_to ﬁnd Va using Node Method..(No credit using any other methods). Provide the following information: a) Primary equations in terms of the assigned Node Voltages . State for each equation if KVL or KCL type relations is being used (box and number all equations, but do not simplify them). Ll Primate]; (Cm/mlﬁan; ﬁWL-S' and” 32 £2er- Problem 2150 pts.[ You are told_to ﬁnd Vx using Mesh Method..(No credit using any other methods). Provide the following infon'nation: (1) Primary equations in terms of the Mesh currents . State for each equation if KVL or KCL type relations is being used (box and number all equations, but do not simplify them). .I ’ )1LJ I} 9 lac-L: 1 ML» Q ilt‘tpéﬁl hole, @ :fza—a'ltzﬁp {C‘CL’ @. 4(IEHX‘L)+LHI3~IJ+?EJ°=U Lat/V e) Auxiliary equation(s). @ ”x t? 4 W5" I? f) Matrix form of the Mesh currents. ELECTRICAL ENGINEERING DEPARTMENT CALIFORNIA POLYTECHNIC STATE UNIVERSITY EE 112—02 ' , Winter 2008 Name E g 1 g l b‘g t: A. N aﬁsi EXAM 1 Show All the Work in the Space Provided. Problem 1 140 Pts.[ The Voltage across and the eun’ent into a device is given. a) Calculate and graph current q(t), o<t<§ 3/ ° 44‘- Jr a e 30 1W“: 3““) MW“) *= Saar-ﬂ \$3 a . t _ g- 2<+<1 , LLH: \$L~Lthezjﬂlf+ ) “A; a . Jahanmgg ; man Afﬁmga L '3 C 44; ' ‘3 Q3 : loo 2 z 3 2—)‘l~\-\1LI_——— b) CalcuLEeE‘aJd gr plyp( ,the absoSIJed) power for 0<t§i\$/ o 4+<1 PTQS‘ILJ(L\): ewe.“ ® K +43 FtCBG)E—L\W))=3éaand’ e) Calculate the energy absorbed at 1:2 see. I l '3 I e '1 1-; 00m: jgmM-xwt‘): 10H L “Maw? 6 Problem 2 (30 Pts.l 3) Find the current in R Ka_A3 V=zk+3£abaiv\ “va -L‘ﬁ-T'iﬂqqlflb -”r *’3—\>L~\-2 (-53 >03“ @{x;;mAl b) Calculate the power consumed by the 2 ohms resistor. ‘ I ‘BQ v" =ot\ (bier (Que-13m} ‘ a culate the input current, 1. Problem 3 {30 Pts.! For the following circuit: a) Find the equivalent resistance across terminals a, 'Qh-ew 2.2+),1w1l: %:Qn(0( Yﬂfgz‘jté‘n) . 2% VJ... . ' 3L9 .__-Q 6 2, m; 3“" am 6 I _ 5—4 :3. (0M - K 3-4m b. [email protected] 3“ c) Find the current 'in the 4 ohms resistor, Ix. ‘ e EL; IltT ~— ._-—- Electrical Engineering Department Cal Poly state University ‘ San Luis Obispo EEl 12-02 Winter 2008 Exam 2 A.Naﬁsi Results Must be Shown in A re riate Matrix Form Be ore bein Solved Box all answers. Problem 1150 pts.) You are told_to ﬁnd Va using Mesh Meth'od..(No credit using any other methods). Provide the following information: a) Primary equations in terms of the assigned Mesh Currents . State for each equation if KVL or KCL type relations is beiﬁ used (box and number all equations, but do not simplify them). H rim/A1 aqua {Tuba 0 3&5 J cab/L: -I;-*I‘+=Ll KW Problem 250 Qts.[ You are told_to ﬁnd V0 using Node Method..(N0 credit using any other methods). Provide the following information: (1) Primary equations in terms of Node Voltages . State for each equation if KVL or KCL type relations is being used (box and number all equations, but do not simplify them). -\/\) .Ur @QQ W V I. \/ \ i E. , i 6) Auxiliary equation(s). i ' {Jot—“U: @ f) Matrix form of the Node voltages. V? @\$> V‘erbqrq TIM—\— Del/1:115 :3) W @ 00‘ (V3)=:r\/3‘\'LH/5 ~U: i/L :‘D‘szm— LN ‘53 .. \ .7 ‘t g) Find VD. \ 2 U1 ...
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