{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

ece202F07Exam1Soln - Notes Name i f{i a s 5 a g St ECE 202...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Background image of page 6
Background image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Notes: Name: i f {i a s 5 a g :- St ECE 202 Circuits and Systems ll Fall 2007 Examination l September 21, 2007 Problem Points 1 20 2 20 3 4o 4 20 a Total: 100 You have 50 minutes to complete this examination. This exam has 4 problems and a total of 7 pages. Please write your name in the space provided on each page. mama, aw m MWWWIM. V mwmmmwwmmw am Please draw a box around to clearly indicate each answer. You must show your work to receive full or partial credit (where applicable). Some questions may have little or no partial credit. Please, please, please check and double-check your work and calculations! I All answers must have units where appropriate, and be in proper engineering notation. i n 1‘51. [20 pts] Transform th ‘follovi/ing sinusoicls into phasors (using a cosine reference). answers in polar form. 2. [20 pts] Convert the following phasors into time-domain cosine-based signals With a fragquencyflof (a) (C) w c x : em 3 § A a) [4] v<t> : 21 cos (4t — 15") V i 3 § 3: 1 2? g. _§ § ; s .u Home www‘c mmwrmaww w-memumwmwwwma We m m «mm, m Sm flow not § A»,K~Wy«~w_ J”: 159.155 Hz. (For parts (c) and (d), perform the conversions by hand—do not usewa a), g m of; A r ,f [a 2 calculator). I7 = 5—j12v V7 mm M, K «awflv'KMwW-zmvrfl £Pfir‘w“ [7 2 ~ j 9 V (do not use a calculator) «2.1m marl-'4? meaw wwmwwm m mmmmwmwmmmmmwmwwwmmmwamw Nu“. Page 2 of 7 3. [40 pts] For the circuit in Figure 1: (a) [12 pts] Transform, draw and fully label the circuit in phasor domain. (You may ignore the labels (b) [12 pts] Convert the voltage source into a current source and redraw the phasor domain circuit. (c) [10 pts] Using the results from part (b), derive an expression for the resonance frequency,f0, in (d) [6 pts] To obtain a resonance frequency offo = 79.58 Hz, what is the value of C if R=1 kg and L Name: § 3 3 i; s i figure § firmit diagram fer ifirobéem 3 ”1” and "2” in the diagram.) hertz, in terms of the circuit elements. xwwmuva/a‘,» Page 3 of 7 i t g ,. f ’g 5 g E§§§ :fiafiéwéfiafiufi éfifia xfayieifi S 53.22 ;,-y,««/ ,« WWW m ; he“, z fax, a WMwWW “a w , w ”4* 4 _ M f. m m m w W4 Page 4 of 7 r $23 .9 gig: W} K, .3 «a: $355 $ .skziv .m. j (:Wg » fiyikx $ng w x x2 W Qx WWWM.WMWVWM,W,Ww m N» - 93$ a m 35:3 fiiwéiwisi a» _ {i . w, ,. \ ,\ 3. Cont’d (addi ional work space) rs airbag iriééai « i.) ,, .xéam 3 a m , _<,. «35, await.) '1, {Wm mvaWM‘ fifi aha ml a ‘ X 4 I 2 m1. m~m§w~wm 3 m m w m _{¢2a a mK‘; N” W w W . Wm H flaw kgu ‘ u f M xv afi, fixm _, 5. max cw fksp&ce) W 4 EV a a a » ._,. , m W w 3 n w w 1% (add 3? d I 3.Cont «3,34 ,4 Name: 5 4. [20 pts] The sinusoidal voltage source in Figure 2 has a frequency of (o = 5000 rad/s. Using phasors, E find the steady state output voltage, van), for the circuit. Note: You must show all your work to receive credit. «n,wxm,».«<9o>§k’a:'km‘rat;;-.<:(<ummxvunan “mm”, Mm W. WWWYHK') we»: xwlfla Wainmiw2HMMWQTWWW‘:Wmmwmwwmawm\Svarmwzemxwmmma w ”MN” w M, N WWW» m yummy» wwvmm«m‘qu§fl4w§£fl33¥émfi(fi awrwwemmvgwfl,mfivmmaw‘Wmmwiwmumwwmr Mwawma Page 6 of 7 wmnmmnwmwwewgwamw- ‘ $252: 54%. xfifkfifiuvi : Eye éiai . ,3 Page 7 of 7 4. Cont’d (additional work space) ...
View Full Document

{[ snackBarMessage ]}