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PHYS 2114 Exam 1 Spring 2007

PHYS 2114 Exam 1 Spring 2007 - Dr Bandy Midterm Exam 1...

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Physics 2114 Spring 2007 Midterm Exam 1 Dr. Bandy Page 2 Signature r, l -~ ...\ '" i {;. I- I l- 1- ::;-D ---- -- - t ~;11~;1 Problem 1 (Use Fig. 1 for all .. "cbes) /' v (36 points) TIrreecharged particles with ql 0 .6C, q, = -7 C, and q3 ~ ;.8C are placed on the comers ofa 3m x 6 m rectangle as shown in Fig. 1. .. 'i'-(a) Sketchthe forces acting on q.. :abel ea 7 h carefully. L\\S (h) Sketchand calculate :be fo"'. '13' \! l~. ..,. ;-, (c) Calculate <l> a through the (~~,sian surface ':encJ6sing charges q, and q3 at a distance of 10 trr., ;: r "1Z (d) Calculate <l> a through theG".~,jan surface a enclosing'charges q, and q, at a distance of 100 m. =- r f .::i< (e) Calculate.he flux <t> b thro .;:, _'e Gaussian surface b (see cube) outsidethe charges. Explm,;. (;/* r----------- '0) 2,: '?- I 'VII \::'() .., , 'r- }mm 1 1 ':,;, r ~i _____ ._. r••. ~, •Q Q N,r""r\ , ..... --, J~m :. LING>' .- q l ~ C~ : ------------- r'--'-~ : ~.__ .V ':,,' ~Q..~\fj~' '5j . ( U) ,'Y' ,i J ...,,, ,~ - ~ ~ -¥f('~ ~ r' ~.\7 " /O~O'_V II( ,'\ (;3;~~; .• J -:; '-:_,~-:-~---\,-\ ~f/,}~ f\"" ~ - D~_<i; 'Fl"-;, .. - <::..!_~~,- \,,1 j / \'V ,r------ --- ~\''''V'1 :~,J _~.~~//'" . -' '-', ,. -_.. ' -_._--- --,--_._-----'-~_ .. , fil2.. .- tr" ~IJ (

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ysics2114 Spring 2007 Midterm Exam 1 Dr. Bandy Page 3 (40 points) Problem 2 (Two Parts) 0\./'-'- Given: Gold wire: radius 2,0 mm, n = 5,9x )028 m,l Part 1 Consider a gok ,,,;, ,oflength of 65 em alld unifonnly charged at 3,0 e.
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