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# CH28 - Ch 28 Solutions 2 The EMF will equal the terminal...

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Unformatted text preview: Ch 28 Solutions 2 The EMF will equal the terminal voltage when there is no load on the battery. The terminal voltage will exceed the EMF when current is driven backwards through the battery. 9 The equivalent resistance will remain the same, but the power dissapated by each resistor will be ‘4 that of a single resistor. 11 The birds sit only on one wire. The potential difference between the bird’s feet is almost zero (the wire is a conductor), therefore very little current goes through the bird. 13 The brightness of a bulb depends on the current running through it. The bulb also functions as a resistor, making this similar to an RC circuit. Thus, the bulb will shine brightly at first, but slowly dim as the capacitor charges. When the capacitor is fully charged the light will not shine. 16 The resistance becomes significant because it dissapates power. Over long distances this adds up. P : 1‘2 R. dissapation of the energy depends on the square of the current, thus we want to minimize current. 17 The headlights in a car are wired in parallel. This way if one burns out the other stays lit at the original brightness. 19 P = V A2 / R. The highest powered bulb has the lowest resistance. In series they all carry the same current. P = I"2 R. If current is constant the bulb with the highest resistance will output the most power, ie more light. This is why the 60 W bulb is brightest in series. In parallel the 200 W bulb will shine brightest. L9G \ 1 1 Ray: ( {0111—53 +1Sﬁ) 5 2‘21), (7 KW: £3341 l/s 250V 17 25.71/ 1 3 * 3.32;; 17 Wis 5 j: WWW/3 bafﬂe/y AV agfgss flu. Fab-'b‘f‘vf r1174" 4 Re? ‘: ‘7 AVG? ’ ”Vi WW") To Can cufﬁbnf’ Harng ZOE/L marsh”, “FL/.— ZUﬂ— AAA 551 56’“ka (1' jal _. 5.7 1/ j /’ 227A R 2.5% L/ , L.- 28.10) i; 33!. {Ml}. “sq = Av 4— IR; SOV— AI/ (Av ) '1 IMJ’L L1) (1550,14; 5904 g. 04L )’ fay. , R " 50V :: SOD/«A lave/Fe {MI}. ’ W 4" 4" 25’ I?) 6U TIaa W IIdjg alarm; 53/25; I ”WNW; a’mdc; 31:2;2 IV} FIDIC’W’I'IW I} I716 [27555ng [uh/6’ I’M [MHz/d (4'33. 01me (MM/IN mngm I! 726 Some, . g- ‘Thii‘mam I'ImL Va,- 3 MIL”; > [/21 [/3 {.7on agrwm V} > V2 , R: I’m 51'3”“ W‘I/L' 'nﬁpamlng all [/0mbwﬁtIrm a; {111. Ina/6m [1/23] watyht'A; 512296”. NIISI’meé (MIL/MI?) _ 22R 4———-——-——--"""""" ,_ ﬂéﬂ-: 3ﬂ+an+2I) . . L": . V" Uz+I/3 3% “”61 I/aﬂ/Z, [/3 7 ‘2' >142. 71"") PMC’M} ‘ﬂHL 1/, 3 E" _. TL'W {I}? POIW‘IWI pIJﬂa/é’mwﬁ (we, I'm Iang alwwIIésrL' E) Fr’D-m (a), we Imrw I)“: % I/Lj 2V \$4410, (/2, 197211: féwg 61.6712: I’d/:ijg Ill/73p LILWH nf.£IIFu/AII€I CMbb'nolﬁW III/ﬂ R: zjfaﬁd KL] 774qu[10 ”(3145 911446 \44: 5’ bi -' .22 W5 c150 know I'ImI’ V11 : If; H/S AMI {we WI'IIy 6 drop; (Lara/z; [g ,5; . ' I V2 ‘ V , - V3 I‘CIIE'If/"f d’Q‘gg” papal/71);,“ IU/cslyﬁwwf ‘Z ' (if (02/; If}. ’5)‘ 5:? - L) { m5 carrmr (Nova: )mm res/mar; My; be 76g 14mg] wmm 74¢ (Ta/mm; Waugh FwaHEI {El/9r} ﬁ’v Lid/{.616 {‘4 Fﬂ’ﬂUVﬁLM {7725 ”1/5245 {/‘Z ‘ﬁrc /€;-(3_7éﬂ(€£ 1+ 42am M 12:15, 1': ":32”? ”2/79, ml 321,: 41;“ 50.- 0’) TM LHCWHWL "Cm” ﬁd bﬂlﬂy poi-Hi; 171/234 £1. z/(p It :- T Tim LQNKML dmfdif 15 pm 7:17va 'ﬂt +WJ bi’ﬁ-MC'LQ; yﬂ ‘7)”: ﬂame/[E/ rgjf‘j‘J’m/j} Fﬂf’fmtiv TL'AYL I : I": 'f‘j21 , 5:}: ca 3 It; '54-‘52; +3113]: L>Il: "-3— L .. Q I FV'Wny, 7115 Car/614+ ‘ﬂ'm‘yL [22 and I?) 8 ﬂééame 3 . I I; :IL 0%]? -" ﬂ 6) Iwomrﬂﬂ I3; ‘f‘wéfma 7‘)“; 4m“ mama: I}: 7% (Sr‘réar'ié {haw abaléWY [5' a (LJVIS'JWYL ifd/‘lLlyé {or/mm, 7741? w!“ Mme T216 797“ CamrLI/ij 7CW T145 buHﬁ/ %0 clan/aw, 7%.; man; '71.qu I, mva deem/1%, pua'ﬁﬂe {nu/ma [n f‘tffilszﬁﬂé' any 715 (El/R; péﬂ I. 716 Con/fémvl’ ‘ﬂfaya 71115 p672 muﬁdwrmg, thy, 5'ch The 61496499,; ode/{7,5 para/la? M65446“? aka/mm, ”1746 Luwawf’ ‘Thwvh R7 mud’MQ/Mggl {#356 [Jr mnlﬁuw [9 awéltte‘yacl. I” ﬁummmy: ‘ I: J/,- I]. Jr; 13 ‘14, IV}? E33RI :2 IZ3R M'in R3 MWLTMIQE/ l-‘iL Mum} kit? (in (Whale gmfg’a drug & cum/’ﬂmjl} {22 ad Q3, 914a; E 409; ”:19 W WM pm my; 7?sz £3, mgr/ax Cam/ﬁrm W ”Hum-ﬁzz {29 Z , 3 ‘—, Iq : ’1? l 28‘20) Uigﬂor [twirl 251/: Idiom-M 20mm”) 1,: EA : ,7/44 7 .Iz%-:R : I; 3:2; 1.29/4 5; — Izb‘oon) + WV 2: [2.9V 23.2% I, :; -— , 355 MA ,- 9 A L; r 2 9 M :3 ; 3103/14/43 LljZLéf' - «5/26 L}- RC :: ’jQ—é Lu‘l 0”“ {'[00014/ _. RCb "Ll _ {9925 ..— 5250M ...
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