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Lec 24 - e W Wq LU Hawk m =/aézoyb(4531 use a(— 531 =...

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Unformatted text preview: e\. W Wq LU. Hawk m = [/aézoyb (4531+ use a» (— 531 = Zigzag]— me = -— — — T _ Mallard EB 2H1 Spring 2903 W lil:U[l - Homework: M.'i.?.l Page 1 of? % Homework: MS? .21 a You ma},I Submit this Homework a total of 10 times and receive full credit. View cumulative cont ieLion stat s This is similar to problem 5.59 in our text This question is adopted. with permission _fi'am the pubiithen from ambient P22! nfacr textbook. Ei'ecm'c Circuits, Nl'i'flon and Medal, jot edition. Addison-Wesley. I996: it is interfleo'for use by mgfltemd students at town State University and may not he asadfar other purposes without the emrefleti permission of the puhlisher. The switch in the circuit below has been in position a for a long time. At t = fl seconds, the switch is thrown to position b. IS = 35 milliantpcrcs CI = 0.38 microfaratls R1 = 4 kilo-ohms R: = 2 kilo—ohms a3 = 1 kiln-Elms R4 = 5 kilo—ohms R5 = T kilo-ohms 1. Find the voltage-across the capacitot. vc. at t= (1* seconds. Define the polarity of ”"1: to he positive when the top lead of C is at a higher electric potential than the bottom lead. __5 volts. 2. Find the time constant of the current for t 3 (1*. l _ _ ___—_ ___' milliseconds. 3. Find the mathematical function for iutt} for t 3 N; then answer the following questions : a. What is the value of iutftjl as t = to 'i I : milliarupercs. b. What is the value of infill as t goes to infinity? ___ ________ ____ milliantpercs. c. What is the value of infill at t= 115 milliseconds ‘i' I rniiiiarnperes. stored in the capacitor at t2 0* seconds. | - 1 #- rnicroJ ocles. https:i’i'eoe-oniine.ee.iastate.edni'EE2Ellspfl3 mufflflfwehq nineg'i riSea sioniD=kroentpeLl U3... 3! “1326133 Mallard EE 2‘31 Spring EDIE MWF lflflfl — Homewprk: MJJI Page 2 of 2 5. Find Ihn maLl-mmalical fuucfinn for flat: powar [as a. function of time} being di'ssipatfid in R3. ti'ten answer the foilflwing qucsfians : a. What is this total encrgj; dissipmed in R3 ave-.1- all Time 'I' I _ _| millij miles. b. How muxth—cncrgy is dissipated in R3 from t = II} In t = fiflfl nflcmmuuds 'I' I millijmdcs. a It a r' h .I 51 -2 Gama-"e Materim' Copyrfgiu @ 3993 . 2503 Iowa 3mm Universfg' https:Hccc—onlina.ee.iastatEfidufEEmlspflEfimwfl Wwebquiz.cgi?Sessionfl3=kruampal_lfl3. .. 3! l WEED} :‘RC (1(va Yb fioQT‘C—Q‘E —— Madurai TQSPQWSQ ill?) =% :- \1R?ét/"' A ,tvo WA -- 0‘0 1;;th when 5.8 The switch in the Circuit shown has been closed for El long ltimc and is opcncd a: I : 0. Find (a) [he in'tial value of wit} (1}) the: time constant for r :2- U (c) the 11L.m<3ric:1.[ expressim for 2213} after the switch 11:15 been opened ('(1) the inltjai energy stored in the capacimr (c) thc length of tj1'1'1c_r.'eqL1ireL'i to dissipate 3‘11} 01' the in‘tially stored energy. j I ---—6 2n <11 “94’ - U .T. {KHA/ ._. If. 3. I .5 FHA $80 kél ‘SU ki'l ...
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