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EE 220 Chapter 3 Examples

EE 220 Chapter 3 Examples - EE-220 CIRCUITS-I Chapter 3...

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Unformatted text preview: EE-220 CIRCUITS-I Chapter # 3- Examples @ F 3.2-3 Consider the circuit shown in Figure P 3.2-3. (a) Suppose that R; = 6 £2 and R1 = 3 52. Find the current 1' and the voltage v. (b) Suppose, instead, that 1': 1.5 A and v=2 'v? Determine the resistances R1 and R2. (c) Suppose, instead, that the voltage source supplies 24W of power and that the current source supplies 9 W of power. Determine the current i, the voltage v, and the resistances R] and R2. FIGURE P 3.2-3 Pas-2 Consider the circuits shown in Figure P 3.3-2. (a) Determine the value of the resistance R in Figure P 3.3-2!) that makes the circuit in Figure P 3.3-2!) equivalent to the circuit in Figure P 3.3—2a. (b) Determine the current i in Figure P 3.3—2b. Because the cir- cuits are equivalent, the current 1' in Figure P 3.3 -2a is equal to the current 1‘ in Figure P 3.3-2b. (c) Determine the power supplied by the voltage source. 69 30 29 FIGURE P 3.3-2 La) K: é+3+l+u:j$\f1, h—-.-—._ té)‘_iQ—8.——q _ L~— Igfigéflu LC) 8: est : age-wet? file}:- : SLQSZW Q8 V We? flue? I. any “fine?" M 1112, yam/my»: a enh'evx M -——-——-'_'- @ O ' P 3 4-1 Use current division to determine the currents i1, 1'1, 13, and 1'4 1n the Cu‘Cutt shown 111 Figure P 3.4—1. =22! —-——«————— Vé FiounEP3.4-1 G $ 2- .. I: 1 KM ... ‘J—A , 1 l+2+3~4’—QD— 3: Ll: , /3 . x49 __ no 2 m - —=—}L J. ..L “~— 2 —— c; 25*: fi+l+§+3 3’4 .. -. [ ES 2‘ i bf ' Rf? Z I eie*2?1 P 3. 6— 6 Determine the voltages va and v and the currents 3:13”? id or the circuit shown In Figure P 3. 6- 6 Answer.- va=—2V,v=—6V,i.,=—16mA,andia=2mA 1b ‘ c9 SKf/L Xiwwfi. L :: d iBK~¢+Q EKVL _: QSxingme-g ivxjv3+mxm$ FIGUREP3.6-6 “(TLC— , :— D...3 ._-__, , '. 1x133 {—‘Lc; “L A 32“” U’:————T—————7‘\i?_. "i__§._w r, olwaarlxmB "— £2 if was; é _ ’q R _ JOXQJSfi :: 2K" r2 iD—i—Q.§ b3 NM UTK‘F Umzifi’é DE;— 18-, JE—eroxwxmb KCL. Cd’hwaeflf “i8"— _LL_L \ {3: U“ i: R- : _.2_L_/ D W wiD-—£»;a— LG:-o =5 LLZ—ié’wflr detenfiine 1', i1, and 52- Answer: Req =8 5'2, i=5A, A 25/3 A, i: =SJ’2A @ P 3.6-14 Find the ch at terminals 21—13 in Figure P 3.6-14. Also 6:.) F 3.8-4 The circuit of Figure P 3.8-4 represents an auto's :1" Eiecmcel system. A report states that in = 9A, i3 = —9 A, and ' I ' iA = 19.1 A. Verify that this result is correct. . Hint.- Verify that KCL is satisfied at each node and that KVL 15 Satisfied around each loop. ii Headlights Alternator s-n i smuggle-4 f:::t:s::.;::::$:;r:y:tm s _ A itVqux/fefiiwjfoi ——M+M tips). 2 to =0? , '— LU __ KVL flaw-“n tart leafs: .42 4.3.5}; (jg: 1:2 1,3420 _. -{2J KCJ— ax'i'me—Q 01.2 {‘j +1:& "II—L: — =— 'Ly A H’ _..Ss€utv\3t Lu} L2) (we Q.) T ' " \' Us: lets/>9. Lg—a—é‘m/Ltém LH: toss ' flatten" V 66 Me. exam/30? 8 DP 3-2 The resistance R; in Figure DP 3-2 is the equivalent R2 , 4 - resistance of a pressure transducer. This resistance is specified to be 200 S? :l: 5 percent. That is, 190 52 5 RL 5 210 $2. The voltage source is a 12 V :l: 1 percent source capable of supplying 5 W. Design this circuit, using 5 percent, 1/8-wstt resistors for R] and R2, so that the voltage across RL is v0 =4Vi10% (A 5 percent, l/8—watt 100—5} resistor has a resistance between 95 and 105 S? and can safely dissipate 1/8-W continuously.) 32L: amei 5% IiciD‘fl'S RL £91991 Ventral—Vi 170,5: =5W Wde,’ V : LW’ 3: IUD/D . Lean?“ mgcgm R. 1-: 90 L153. Ki is (MA 835% CH KVL ~11 %—l3’1+1700\r“ 12+L3~L+1Je:u;-;>L7: 8V (19$: W’Yfiwfle Ah); (- Ng'gL: ash-fl} 5-D: QV [Kl-Hm: ’2 1+ 9— % ;_L£l=§:=oi£,w 7g: ....-— NM M M Wk "Hie, vu—P—tfie Vamahm_ C3 > ’2V+iO/a / :Lrvj; 16% RE: Mmi§70/ 1%“0’4RL <41) 04— 1% J 1179):; )2 Emilia?) ] g? i < 3210+ 71:91) 3'? Q D; < 4? 311,0 C7?) ”90 ‘— a) Fmdthcresistance sembytheidealvbltage a 2:: sun ' sauna in the circuitin Fig. P554. . _ . 41331151, equalsfiDUV, huwmuchpuwaris ' dissipatedin the 15 a resistor? jaL,—'- £39qu éa-i-CZDHED 343—854-— R _ G.» a m g; war—:“T‘T—fl HW5;_%D&WM WEWTLW S ...
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