Exam 2 Solution Sheet

# Exam 2 Solution Sheet - EXAM I GENERAL PHYSICS 11 SPRING...

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Unformatted text preview: EXAM I] GENERAL PHYSICS 11 SPRING QUARTER 2008 May 23, 2008 Name 5559-3." 6 has” Smdent ID # Lecture Instructor Sectiun Number Full credit will only be awarded to answers with all wnrk shown. 1.:e = 11(4nen)=9 x109 H mm:2 a; = 3.35 x 10'” CZJN m1 e=lﬁxlﬁwc 11159.11; 10-31 kg PROBLEM SCORE l. f 25 2. f 25 3. f 25 Extra Credit TOTAL SCORE I 10!} 4. f 25 x9 PROBLEMS 4 ‘5 ﬁt 1. (a) What 15 the electric potential energy of the group of three charges shown In the ﬁgure below? U: LIZ-11F ”if? jig—1L]“lei-ﬁt,““'1';it,HﬂM 3rl.--3-Em..__}5:ﬁc ‘11; ha, V15 5:115“ 'H._x' 9”. -I’? If”, : 4, '11": "' U'q3152%}(53ﬁd)ﬂﬂgl ill-5 :: z C h I I I I I I xterm I I I I I I -t? 0 + M + 09(6)?) 9.61?th mm U: 500 [115?__ 5561—2539] am ftnﬂllﬂ D 3""! ham Elk-Ital. Irr_. ruHirm .. W. new, Que: "" J \$53)”? :rlt/ U_ (b) What 15 the electric potential at point A? V = M13; 35%;] .3 1 5 r_ If“ I7 #151 aﬂpqtﬂw 9,04% (9 VA :- ?_IJ’E[ 250 4 27—4 4—125] 3 ’ 1—H“; VI : 5 "I W 5/0 :r’fawﬂ’; VI: (0] What would be the potenttal energy of a proton located at point A? UP 7" jfvﬁ : e V;- @ “I 5:57) UP 1 HIGH)“ C) {1’33” 6 ''''''' "" liar-ah I .. o I _ UP 5. 02 )U 7/, up flair? ‘75 2. In the ﬁgure shown the battery has a potential difference of 2!] V. C2 2 l": (a) Find the equivalent capacitance of all capacitors -Cr_ﬁ-«éh"i-1¢e(iirr-u with 3.4-: ‘E/C‘F Eritrea Jib-’5 :ﬂFCJ-‘idﬂilf n} + 2i“: ZPF Can: hare-Lem MR 3-" 3%!” trafﬁc. Ken-5 "r F“_""eﬁe( Ir:- ' i C -. @ c” 9F 3"": I ﬁAF -o d . »r . 2 3: + La; HC;:FCI:tﬁct-u5 C; Cr “1 Egg-i5 z BHI— _ Candi: W 1m (13) Find the charge and potential energy stored on that equivalent capacitance. —v’ (2/ 6.“,3—5C. r6050 F-Zee’: yEE:-H:13‘#VEC{ - 0-.- ﬂ: 1 icﬂr (05:2 ® U= £00k)” (c) Find the potential across and charge on capacitor 1. qi C311;- Cqu / (a) t J'I‘D Vii-9‘3“; a Lime-£0? O i c" G , (e) Capacitor 2 is now ﬁlled with a dielectric medium of x= 2. What is the equivalent capac ance of all the capacitors new? —l_-- F“ In the circuit shown below, R= 4 Ohms and V= 10 Volts. Find current I with direction deﬁned as shown in the resistor 211. State the appropriate sign of the current so that a positive answer would indicate the current ﬂowing upward, and a negative answer would indicate current ﬂowing downward. \$5 T __ «m @ z W W- (133’ M1 )97: V—Jqﬁ 4 we: =0 @rtjh ”ﬂip: :V +2KI-I3R-f'ﬁ D ft CELU‘fQui 5 Q1161 CEIfE‘CSﬁCJMQ [Lt a.“ FESIS'I'ORS 67 [HQ (PQerﬂ ofﬁﬂf'l: 40 be C} 35.32” : 4. In the circuits below, bulbs 1—5 are identical, and the batteries are identilll and ideal. Boxes .12 1': and 2 contain unlmcwn arrangements of bulbs. The resistances of boxes X and Y are equal, and yeater than the resistance of Box 2, R1 = R, 13- Ra, iii A- Rank the brightness of bulbs l, 2 an Mdih @ If” B. Bank the potential Wand box Z in order of increasing absolute value. Explain your reasoning. L L V2 L v AV cl {2% C1 9'65}. IEZ-ﬁ-e @ 11,1 5.”... H 114. parochﬁ ch .50 5: ﬁ+¢ﬂ~) = vii»?! :ﬂ “gig-E112. 5",” resiﬁleﬂee R) Vie 3 IR. (14.45, 7:91" bolbivls}:w __ W5 M Mire-TE Mu; V'z-ﬁvygvx C. Is the brigftnﬁs oﬂbulb 'rhnn, less than. or equal to the brightness of bulb 5? Explain. @ﬁ>5> 1b 5w“, elf ﬁn. Valﬁ'ye airti5 31:; Elena?- :V+V Ml gel/5+9"; T uR-mEsorFa?TIﬁW““- 5 1-» 3_ @ 2;]:E aging/LI} loge AirMe-Fcyrzm “1:33;!" Hiram?" ﬂ...“ thjﬁﬁ } 11,45 Va 3W? D. Suppose a second box identical to box 2 is cmfnected to the circuit as shown. Determine whether the brightness of each of the bulbs below will r‘nereaee. decrease. or remain the some. Explain. . bulb 4 'I'TJ—c rma‘- 9335!! “-3 tn )1 T9 {ﬂariiﬁtﬁ reﬁvéﬁ- Th- ”ﬁn-ﬁgfcﬁirm ...
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