AnsSomePractProbsCh20Spr10[1]

AnsSomePractProbsCh20Spr10[1] - Nab...

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Unformatted text preview: Nab: 4?Gkafiébg)%.';-}€'~rgz,.'¥=43,5»,V” f , I.“ 333$ .3 _ .r‘_+5\/—l5¢)-2(-LK)'_IOV?“§,QV W” Eéuimmfiw gJI-fizowfib 3 fidé 5:1, 3. I .3 53+3Prti—5T7fls; asifiufrtpfnflwrough, . . Dist. [Gap-bultbp..§:"a 3 ustloopt‘ul‘tfikiiV 7 U§.nlou,P,Pu~l€0L¥~—§,, ,, ,. _r~_£.__+ Z¥+IZ?0_. .tez—xsof-Mao. _ _+aa&:§"y1—3¢,w - £331.34 7, {figefv .. _ mans 7. m ' i Some practice problems for Chapter 20 1. A 39 resistor is connected in series with a 19 resistcr. This combination is connected in parallel with a 32!} resistor. This entire combination is then connected in series with a , IQ resistor. The circuit is powered by a 12V DC battery. $51.35* I‘Z'Zflf Rn“. gee chtu‘i": 27/4— Imr”%:= 3pc Draw the arrangement. 3125-7 I: a. Lou-7 mass-A Hm I? as mi??? “- Q‘QSV’ V: 3\/ “IF—fa..— . -—-—-‘-'__-.__-”I’ jaAu-7;=JSA;V: (2V Find the power dissipated in the IQ resistor. szzixzzziz=£=qw 17:, i “W Find the power supplied to the circuit by the battery. P: QWIWT: 15$ 080 55¢ W' W 2. An 81.113 capacitor is ccnnecteé in series with 3 15M!) resistor across a 1003? battery. A switch is includeé in the circuit to control when charge begins to flow. The switch is closed at time t = i) completing the circuit and aliowing the capacitor to become fufly charged. The battery is then removed from the circuit, ieeving a ccmplete circuit with only the capacitor and resistor. The capacitor is new aflowed to dischaige through the resistor. Regarding the charging process: What is the current through the resistorf‘in the cixcuit”) as soon as the switch is dosed? :- Iéa'fl’LH‘fi ~ijYm1: w: m 3 (“(97%“) (9A. R 51:0be What is the potential across the plates of the capacitor when a period of 49 seconds has ela sed? ' , _ ‘Hfi- Vc: :@03Li* {1- I; What is the potential across the register when a period ef 23 seconds has elapeed V‘L" IOOiI— 61.13%? \ VR: 100 (kw/172.0 Vane—Va H CH” _. (349v chl5‘4v a“. VR: {OOV’F'IS-‘vag -(oV '___.. What is the change on the piates of the eaeaeimr when a period of 29 seconds has elapsed? @ 1.: C. \/ "" W What is the current fhroogh the resistor (“in the circuit”) when a period of 2!} seconds has eiapsed? IfiYi-s fléfif— = 5.o4w0"('fic R i5~HobJL What amount offime will have elapsed before the magnitude of charge on the capacitor _. +/ 12 o Plates iS4X10A‘4C? ”Var-V303: D- 6%,”; fl ”3% . (6" e. .. «4 o a . Ye=%: fiJQijafi'oV 5afi‘bofilfle‘fil) waQSI“ ”If: $10“ 4-; _ a; 2/ ”.0 /b e _ 33.95: ‘t What is the potentiai across the plates after the abosae me has elapsed? . V c = éflfl What is the current through the resistor at this. time? Sin—CtVCfS-OV “RNM‘VC i Emilie— 5% 23>83w0’Q/4 ’IOOV ’51») P‘ {EXIOEFL \Jkté—OQ Regarding the discharging yroeess: What is the charge left on the capacitor afier 10 seconds has elapsed from the beginning of the dischargiog process? r I +205 when olxschnra-wij Process 64af+3 v Va: V0 e—“FE’ What is the potential across the resistor afier 33 seconds has elapsed from the beginning of the discharging process? —3 VR=V+ = 100 (*2. oh» e7’ZW What IS the initial current through the resistor right at the beginning of the discharging I31""3‘3~“’S‘~’_T. ‘5 am here. 7: \lo _ IOO\1~ (a t )6 MR1 R igch’a :fé é 7X/0 What time period wili have elapsed when eih: capacitor has lost 38% of its gig: 4.530%‘M3'7oz/éf7‘ Va .. ['20 fl 7: e. e—«thzo f 35997 fféa are; t 3. A wire conductor made of aluminum is 1 meter iong and has a radius of Sam. This wire is completely melted and. reformed such fliat is new length is 75% of its original I AR J? A z 3 length What is the resistance of the newly formed aluminum wire? 1 A1 n; Q7512 )4 ; 2704212370£aw09mg .SGZ§</O_»A£1L1a5%ill% A: fit A"?- ' Q I335)0ib «Q “662700 €>L®Q§ as)?“ TQSQZ‘QQ 5:?3610 9‘) 1“ 3 5%: 0"“UD = W 4 Wire A is three times longer than wire B. The resistivi IS twree that of A. However, the diameter of B is twice that of A. If the resistance of wire A is 1989 calcuiate the resistance of wire B 4;: 345 RH flew/7 PB“/§/P___: 3:123 T‘t‘OOO—I’L) AA 5,3 52/5) iooiteflfitffl 201/0 13in "5* [Q7112 >B’QDH r. Aggy/3f“ I4 4AA I PB 4. girl 5. Three resistors 39, 99, and 109, are wired in series. This arrangement is their wiredin parallel with a 2552 resistor The network IS then connected to at 6V battery. Draw the arrangement and calculate the current, voltage and power in the 99 resistor. "ISL 91L i041» fl_ 23m gncross {up Breach fly $161» is; WQL Ia'zbifl- ll. ~1= gamma)": 2. 03V (9% p : L210?” CZBIA) $.43 ...
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