prac exam 1 - EXAM 11 GENERAL PHYSICS II SPRING QUARTER...

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Unformatted text preview: EXAM 11 GENERAL PHYSICS II SPRING QUARTER 1999 ' May 7, 1999 n«am.nm.z..«m»¢._au.4."Knucwh ‘ , e . A.,_ Name KQ/IZ Student # Lecture Instructor Section Number , l/(4ueo) = 9 x 109 N m2/C2 so = 8.85 x 10'12 Cz/N m2 Full credit will only be awarded to answers with all work shoWn. c z ‘1‘“) 1. Three charges, Q1: -3.2 x 106 C , Q; = 2.5 x 106 C , and Q3 = 5.7 x 10‘5 C . are located at three corners of a rectangle as shown below. a) How much work was done to move Q1 , Q2 , and Q; to these positions? b) How much work must be done on a charge q = 1.9 x 1045 C to bring it in from infinity and locate it at the fourth comer? c) How much work must now be done to move charge Q, from its current position to the center of the rectangle? Q _. _. ,. 3 i. l _ r e e 4; (Mitctmh um ' 1, LL} w l I 5 ~— —— —— .- - .— ——— t '3 — 333t3l§¥\0’3 + \BSABHD .— — z _ 3%, (xi/033°in 2. A. A Spherical capacitor consists of two spherical conducting shells. The inner shell has a radius of 20 cm and the outer shell has a radius of 30 cm. The region between the shells is V \W avacuum. 9 What is the capacitance of this Spherical capacitor? @If the two shells are connected across the terminals of a 12 volt battery, how much C? energy is stored in the capacitor? b a5 V.-'V+ = *V e'fE'J—F C779 4' L : a avg} ’J’ V £777? Inset-’1’“ “v v: %?,['JE*’LJ‘%E[%3 (5,2H:)(0o3h) 1 I flz—p . @ c e ‘% 1 ””6°””%W>‘W 6 -:.~ X/a—H‘F .' l ‘ Uzgcve = Jiw.e=7x/o"w¢3(|2V> -' flaw/0 I 4 @b” 2. B. Calculate the equivalent capacitance of the circuit shown below. What is the charge and ‘ voltage across the 6 uf capacitor? 617 7h Farah, C93? 5 fiM‘F'9'gdk‘p ‘ ’z’wF— MY. 3n Seviei ~TJ‘ ’ ’L—J'AL’ 6.0M; 44‘” 69,? . a ,J/ ‘ dissipates thermal energy at a rate of 48.5 mW. What is the resistance of the wire? What is the resistivity of the wire? far-211R —3 w—‘fi @{ y: = W: /0'03/5‘L ,'l K = W [LZ‘fABZ _. L , 7. R ’ 57 jg; fA/azfl “(m/$5001) [p,03/5)J7_ e circuit shown in the diagram is made using identical light bulbs and an ideal battery. ./7 , he greater the current through a light bulb the greater the brightness of the bulb. For each of the following statements circle the correct answer. a) Bulb A compared to bulb B is: brighter, dimmer, b) Bulb A compared to bulb C is: bri hter, the same brightness. c) Bulb B compared to Bulb D is: dimmer, the same brightness. Bulb B is replaced by a wire with much less resistance than a light bulb. d) Does bulb A become: brighter, stay the same brightness. c) Does bulb C become: m dimmer, stay the same brightness. 4. For the circuit shown below calculate i1, i2, and i3 for the following circuit element values: E"! = V, = V, R] = Q, R2 = Calculate the potential difference V. - Vb. 3V+ 2:2. L,—— 4.1124. zév +2.CL,¢/,=D I far YyJ‘f/WF.’ £,-g,23«K,;1’£L’P.A-s- ' W «21243 —qJL;7,*ev’7—fi-s:0 @ ' ’5‘ng ’qifikzo Subs-l”: T’u'l‘e, 5%,; 4: 5?. 3 rn'l‘o : .42 4;” 7MP?» =0 +57. 4- Z; (Z 4.0V + (owbwpbr film/“MY ; lam/Z V0," vb : Vw’vb : u i: v ...
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prac exam 1 - EXAM 11 GENERAL PHYSICS II SPRING QUARTER...

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