spring97e1 - 21111 21111 PHYSICS DEPARTMENT PHY 2005 F....

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21111 21111 PHYSICS DEPARTMENT PHY 2005 Exam #1 February 10, 1997 F. Shari¯ Name (print): Signature: On my honor, I have neither given nor received unauthorized aid on this examination. DIRECTIONS (1) Code your test number on your green answer sheet (use 76{80 for the 5-digit number) . Code your name on your answer sheet. Darken circles completely (errors can occur if too light). Code your student number on your answer sheet. (2) Code your section number on your answer sheet. (3) Work the questions in any order. Incorrect answers are not taken into account in any way; you may guess at answers you don't know if you feel that a correct answer is listed. Guessing on all questions will most likely result in failure. (4) If there is no answer close enough to be correct, the correct answer is to leave the question blank. You should not expect many of these. (5) Black the circle of your intended answer completely, using a number 2 pencil on the answer sheet. Do not make any stray marks or the answer sheet may not read properly. (6) Good luck!!!! 1. Two small metal balls are charged. The ¯rst ball is charged by adding 50,000 electrons to it. The second ball is charged by removing 30,000 electrons from it. The balls are brought together to touch and then are separated by a distance of 3 m. What is the magnitude of the force on either object? (1) 2 : 56 £ 10 ¡ 21 N (2) 7 : 68 £ 10 ¡ 21 N (3) 3 : 84 £ 10 ¡ 20 N (4) 1 : 15 £ 10 ¡ 19 N (5) 1 : 11 £ 10 16 N 2. Refer to Figure 1. Three charged objects are placed at the corners of a triangle. The objects at points A and B
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This note was uploaded on 12/15/2011 for the course PHY 2005 taught by Professor Lee during the Spring '08 term at University of Florida.

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spring97e1 - 21111 21111 PHYSICS DEPARTMENT PHY 2005 F....

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