EE215sp02m1s - Quiz 1 BB 215, Spring 2002 Instructions 1....

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Unformatted text preview: Quiz 1 BB 215, Spring 2002 Instructions 1. This quiz is closed book. You are allowed one sheet of notes, a pencil, eraser, and calculator for this quiz. Everything else will be provided. You have until 9:20 .m. and no later to complete the quiz. Please pace yourself; the weight for each question is listed next to the question. 2. Please put your REAL NAME in the block at the bottom of this cover page and on the top of subsequent pages. Your signature and name on the last page indicate your compliance to UW academic honesty policies and your acceptance of these instructions. Absolutely no academic dishonesty of any sort will be tolerated in EE215! 3. Explain your work clearly using pencil only. lllegible work will not be graded. Answers provided without explanation will also not be graded. 4. Good Luck! NAME go i Whom Page 1 of 4 April 15, 20.02 Quizl Problem 1 (10 points) #5 a) List all resistors that are in series with R. Answer: NJM [2 or”? Md: only M b) List all resistors that are in parallel with R. R1 9v R2 Answer: mwl—g flQY HE 215, Spring 2002 Problem 2 (15 pts) Find the voltage across R1, R2, and R3: +7016) +3016) + 0! "DH/i d4, 30 V R1 R2 V'iaa r 50k!) R3 PM! 1: 7OKJL+SUkSl + no; Va. 7 7O LJZ 1501131 _. 30K Vu— s o ISDKIL I>’o kn. Page20f4 '57) L51 ‘ April 15, 2002 Quiz 1 BB 215, Spring 2002 Problem 3 (15 pts) 580mA (a) Find the value of i1.. (b) Find the value of i 2. (c) Ifthe current source above is replaced with another of unknown value, and the new reading for i 2, is 800 mA, how much current does the new source produce?. Skt‘m) 20 k k : :. (Q) 5 MM 5L swam ‘1 . K IL 20 you w 560% 1‘3 .— 580 .11. it”sllk3 26/6, kl (a) a» mm «am [’1’- 5 0‘ Cuwowl' d'Vodu’ or kx/L - valid <9? 2 I-Hmr Par 4r) 7—1 5 +5 1 : 5.8 A mkva MM; : JKUIK) _ 4o R)HE3 5(K) ? CZ- 2,.)23 Pfie‘Wg’ I: 5.8 Pr /7 f Page 3 of5 “(1+sz ' April 15, 2002 Quiz 1 BB 215, Spring 2002 Problem 4 (35 pts) (a) What is the value of i? L " 1" (b)WhatisthevalueofVo.n? ‘ RMOOK ' (c) How much power is dissipated in the 1 k9 resistor? L‘ ; R I g a .4“ WWW “W ‘4' RI+I<DK loom R! u IooK (d) Ile decreases, Wille increase or decrease? _ ’8 m L : . (RH Ioox)()ooc+ '00'1 R‘ (a) R ; JOOKQ a 100 K51” 100 KJI moan-2s) , (metal a 5: km . )00 I257, imagl >03le IOOKCIOOK+ RO-i ‘OOKR: / / 4 Q7 :1: 2:23;...“ ; —;3— ’~ I§DK3L \o‘O+aooKR. £+ao®fi ’”"_\, R, ' ’ 'ZV ‘ l0 7‘ \ 7‘ l w LI — I» ‘ (0,07mpf ., Pg (15. va L ) $0 ‘Vooti \L "g '2‘ Jet/(ayes, ‘HM efuikuw+ “3‘5LN‘CL “’6‘ “M 4W) rfinW‘ E5 5"”?5' LL55 VOHIéL ’Ls dismpakd i" ‘MNJ’ P°'*~~’J\A of #M WNW}! obvider, wgw [L55 WM”); mid 44M Sam ((slsiawu/ k WV deuce”, MQWWS (A55 04va Mwmwjtt m “(17, (es'véi'av find a VJ»; is [455 nejwhcl Page4of5mv0fm,m 0*ka WW W‘“@ Apri115,2002 -\_ IS 035,3 Quiz 1 EB 215, Spring 2002 Problem 5 (25 pts) H You hook up your new power supply to a speaker that behaves exactly like a m resistor. You choose to model the circuit as below: I E av we : I (The dashed lines are not a part of the circuit, but merely indicate the region that is part of the power supply, as opposed to the speaker) You set the voltage to 20 V on the power supply, and measure it with your multimeter before hooking it up to the circuit. The measured voltage is 20 V, as expected. You then hook the power supply up to the speaker and measure the voltage across the speaker terminals. Applying KVL, you expect a 20V reading, but get only 19V! Assume the external wires connecting the power supply and speakers have a resistance of zero in this problem. (a) What about the power supply might be causing the voltage loss? Why did it not show up when you measured it disconnected from the speaker? The owor sumo PM a Yesis’i’zncc M sums wiik MM, voH-zag, Sonia (Mka rca‘aivmoc) , WM “W W!” is WS'mmdtglJ mm is an 0W 0790+, 61» no cwvwl' (w , mama”) no V014?“ is $.55)?“le in MM Mitt/M! resisi'bp (b) Draw a revised model for the circuit clearly indicating which portion represents the power supply. I “ “m /0 P43 " (c) Calculate the relevant values for all circuit elements in your new model. Vona: olNiaU/L q : M's-L gPiC)\ Vm" V 20V M‘s-{jg Page 5 of 5 April 15, 2002 ...
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EE215sp02m1s - Quiz 1 BB 215, Spring 2002 Instructions 1....

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