Exam+1+--+Winter+2000+--+Blank

# Exam+1+--+Winter+2000+--+Blank - Physics240 First Exam...

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Physics 240 First Exam February 3, 2000 Your printed name Your Signature Instructions: The exam is 75 minutes long. There are20 questions, check that you have all pages. You may use one 3" by 5" card of notes and a calculator. No other notes or books are allowed. Notebook PC's, PDA's, or calculators with extensive text displays are not allowed. Make sure you correctly copy your choices to the anxswer sheet. Make sure you put the exant.version (4) andyour section on the answer slrcet. Instructor Merlin Bretz Bretz Brctz Yokoyama Roe Merlin Room 224 Dennison 222WestHall 222WestHaII 216 Dennison 414 Dennison 221 Dennison 22l Dennison k = 8.988 * 10n N-m'/C' e = -1.6 10'te C Ine 9.11 10rl kg mp 1.67 to.]7 \s o 8.85 x 19-12 C2A{-m2 I/o=4n 10-'T-m/A c 3.00 10t m/s Section 004 005 006 014 015 016 018 022 023 024 025 026 Time 11 12 1 2 J 4 8 9 10 1 L2 Useful constants: Coulomb's law constant Charge on electron Mass of electron Mass of proton Permittivity of free space Permeability of free space Speed of light in vacuum

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I ./ .,| 't PhYsics 240 Exam 1 i 1. The diagram shows two pairs of heavily charged plastic cubes. Cubes I and 2 attract each other and so do cubes 1 and 3. Which of the following illustrates the forces of 2 on 3 and 3 on 2? AA Z. A neutral metal ball is suspended by a string. A positively ch'arged insuiating rod is placed near the bal1, which is obsefved to be attracted to the rod' This is because: A) the ball becomes positively charged by induction B) the ball becomes negatively charged C) the number of electrons in the ball is more than the number in the rod D) the string is not a perfect insulator E) there is a rearrangement of the electrons in the ball ! 11l v + til tr I t ,n I t3 fr I f'l T f tr ill t-'l -tr tl J- t3 tr V F r;I t-l T IV A)m B)V c)r D) rv E)tr February 2,2000 Page 1
f t' Phvsics 240ExamL i r. rwoparticles, X andY, are 4mapart.Xhas achargeof 2Q andYhas Q. No ' other charges are nearby. The ratio of the magnitude

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Exam+1+--+Winter+2000+--+Blank - Physics240 First Exam...

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