quiz2 - PHYSICS 2B(a QUIZ 2 CODE PROF SCHULLER APRIL 9 1999...

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Unformatted text preview: PHYSICS 2B(a) QUIZ 2 CODE # PROF. SCHULLER APRIL 9, 1999 I. In the figure, two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and of . _ . > \A 7v 9‘ .4; magnitude 7.0x10 22 C/mz. What 15 E C ~ ‘ J: a* , .4 ..; :5 (a) to the left of the plates? (b) to the right of the plates? (0) between the plates? (D m cMacESQA pl'aA—es ME) \/\‘o\L~Q (Agar?er W ZWNM $w¥2>¢m3 @Qc ENG Ag (Aver 42 w Legi— OR’ \ABEeS “C2323; a“; A _ 2 ,_~ 8E,&:¢; = 60 =l> E: ’ 60 by E: = 0 Q 6. cg '- L€3M~e 75% 35¢“ Q» gm: 0 a @le @638; ,i _ 916. + 2 60 7—D ETEA _ 60 J' _\ A O“ E <J> EE— go at? PHYSICS 28(a) PROF. 2. QUIZ 2 CODE #_ SCHULLER APRIL 9, 1999 A thin spherical shell of inner radius b and outer radius c contains a total charge Q uniformly distributed. Calculate the electric field for values of r satisfying: a r< 6 WTLZA §M\ $13)) b—SESC \Aa‘s 105‘ r C: (33” “VF (C) FZC CM’O’CS‘ Q fi$?\/\Q¢1FIQEKK {/9 (gawém Swim (.419 RE A12: {/0 CVML : Q,_ c O A = f4> = 1’2: M30 0 42w» ) 1/22.“ ;\> g wflfl = a0 25 go i _ \ P 4762 5 0 CV 119’ *\ 0Q \/\ “(L : g'g wB>Q (:fioo'as\$ ’D Q 4.7:(8—53 \l°\°*~”$ Q 3 @383 Mc/Qu : (#3405) “9.2—; :: k?) 7:5 Q L 6—3;??(0 "99 g << ’ 3 6? C <34: 9 ' 2 Afifzéo Lag—‘93) 1g, L SE‘AE~ 12% 51> ‘EQlexv9‘ 60 ilk—«- Q N536“)- $3M BS a a“ ’ 1: W. o\v~5\Y Okvo—Q— "4’KCL ea 47<Czéo S; b ? O PHYSICS 2B(a) QUIZ 2 CODE # PROF. SCHULLER APRIL 9, I999 3. It is found experimentally that the electric field in a certain region of Earth’s atmosphere is directed vertically down. At an altitude of 300 m the field has magnitude 60.0 N/C; at an altitude of 200 m, 100 N/C. Find the net amount of charge contained in a cube 100 m on edge, with horizontal faces at altitudes of 200 and 300 rn. Neglect the curvature of Earth. El: ‘LoO NIL glib/wk: 40 GK F‘ssné‘l %\( \oo M32 2 PHYSICS 2B(b) QUIZ 2 CODE # PROF. SCHULLER APRIL 9, 1999 3. A point charge of 1.8 uCis at the center of a cubical Gaussian surface 55 cm on edge. What is the net electric flux through the surface? ...
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