Quiz2-5409 - 1) Four electric charges are distributed as...

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Unformatted text preview: 1) Four electric charges are distributed as shown. 81 and 82 are surfaces enclosing two different volumes. 81 lies inside 82. The total electric flux out of the volume enclosed by surface 82 is zero. W hat is the charge q? b) O. 0) ~4Q d) Requires knowledge of the flux passing out of surface 81. 2) A cubic box of side L contains a point charge Q and sits in a non uniform electric field. If the outward flux arising from the combined field of the point charge and the non uniform field is GD for one of the sides, the total outward flux of the combined field through the other 5 sides is a) ~5® +Q/80 b) GD-Q/So Kc) -<l> +Q/eo d) +5<i> - Q/So 3) A nonconducting sphere of charge q = 1.50 X 10'9 C is at the center of a hollow spherical conducting shell of inner radius r1 = 5 m and outer radius r; = 6 m. Let the total charge on the inner wall of of the shell be Qin and the total charge on the outer wall be Qout = 4.50 x 10'9 C Assume so = 8.85 x 10'12 or k = “(477580): 9.00 x 109 in SI units. a) Find Qin . b) What is the total electric flux passing out a sphere of radius R = 10 m? c) Find the magnitude field at radius R and draw arrows indicating its direction at a few points. d) If q is now placed ofl center, is charge density Qm distributed evenly on the inner surface of the conducting shell? Justify your answer briefly in words. a} fiE‘IJ fie? faeJLaajiWr‘ =30 m. 09 fi/fiex flwae‘gg 5% W M at rm swam ==> all, e a: SM/Gfrzsgg’ b) R) 5’2 3 jib/9%? f/MX EJWC- % Wr/WJ‘GJ réeflf é a. ‘9' grin “‘fi' @626”? “t water“ @ :1" %°f?’a”§ & 17- Qwr/ga E} watfwze g: all} Get wave/t?» dera’rwéflea re fleet‘e‘i j??? flea set 2 ° Jim We}? twee feedesefiew‘, ‘53 ...
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This note was uploaded on 05/13/2010 for the course PHYSICS 54L taught by Professor Thomas during the Spring '09 term at Duke.

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Quiz2-5409 - 1) Four electric charges are distributed as...

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