PHYSICS 240 Exam 3--Fall 2002

PHYSICS 240 Exam 3--Fall 2002 - -l tname Yourprinted Your...

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-l t- tb( Your printed name ,(o, 'r' =C :'(( Your Signature Physics 240 Third Exam November 2112002 The exam is 75 minutes long. There are20 questions, check that you have all pages' You may u* on, 3" by 5" card of notes and a calculator. No other notes or books are allowed' Muke sure yolt correctly copy your choices to the answer slrcet. Make st.re yott ptrt the examversion (2) on the answer sheet' Section Time 004 8:00 005 9:00 006 I l:00 007 2:00 008 3:00 009 4:00 012 013 10:00 014 11:00 015 016 I l:00 017 12:00 023 024 025 1:00 027 028 029 prefixes: Mmega=t06,kkilo=103,mmilli=10-3,pmicro=10-6,nni'lno=10-e,ppico=lg'12 Location 316 Dennison 325 Dennison 224 Dennison 205 Dennison lnstructor Winn Bretz Bretz Kurdak Kurdak Zhoa Zhou Zhou Tomozawa Some physical constants: Coulomb's law constant Charge on electron Mass of electron Mass of proton Permittivity of free space Permeability Speed of light in vacuum k = g.g88 * loe N-m2/C2 e= -!.602 16-tr a m" 9.109 10rr kg mo= 1.672x 10-27 kg €o 8.854 16-12 C2A{-m2 vo= 4n 10-7 T-m/A c =2.998 108 m/s
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], 167 /'1 f/ Physics 240 Fall 2002 Exam 3 N, )N" 5.Inanideal1:[email protected] current is 25 A. The primary voltage is: /,= | Pp = lO' lot t^t Vo ? A) 6.25V Nras \=25 n B) 25,600 V c) 32oo v D)400V ?e=f' 2 (p sov ,':::,,, to'to? N' v'r' '% = tt' v,4 vrT, (rt v.= ,/? (. v '. lndD. *4"' = L( A star has a total power output of W 3 x 1027 of electromagnetiJraaiation. O1?urt spherical particle with radius r is at a distance D=7.5 x 1010 meters from the star. The force on the particle due to the radiation pressure from the star is W 3'lo?7 'b 1,E'ht' rt - O H,H. r---5 7t A) w' ( ,\' Foc\D ) w(,\' 4c\D ) WD m zeto Wcr -: tnD" B) c) ry @ 7. If the electric field in a plane electromagnetic wave is along the y axis and its component is given by E sin(kr - 0I), in SI units, then the magnetic the z axis and its component is given by: F (g, d=
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PHYSICS 240 Exam 3--Fall 2002 - -l tname Yourprinted Your...

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