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Exam 2 2004

# Exam 2 2004 - PH 132 Exam 2 Spring 2004 Student Name...

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1 PH 132 Exam 2 Spring 2004 Student Name____________________________________________________ Student Number__________________________________________________ Lab/Recitation Section Number______________________________(11,…,35) Instructions: 1. Fill out all information above. Write your name on each page. 2. Clearly indicate your final answers for all multiple-choice questions in the space provided. 3. Present neat and orderly solutions to each problem. Clearly indicate your method of solution by including equations used for each part. Final answers should be circled or boxed . 4. Be sure to include appropriate units with all answers. 5. Assume the reference potential at infinity is zero unless specified otherwise. Multiple Choice________ Problem 1_____________ Problem 2_____________ Total _________________

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Multiple Choice (2 pts. each) The figure below shows a small sphere of charge q with a family of concentric equipotential surfaces and three paths along which you move an electron from one surface to another. The innermost surface is located at a radius of 20 m from the center of the sphere and a distance of 20 m separates each neighboring surface. Use this figure for questions 1 and 2. The sphere’s electric field is not drawn. q 20 m 20 m 20 m 20 m 36 V 18 V 12 V 9 V -e -e -e 1 2 3 1) The sphere has a: A) positive charge, C 10 0 . 6 q 6 - × + = ; B) positive charge, C 10 0 . 8 q 8 - × + = ; C) negative charge, C 10 0 . 6 q 6 - × - = ; D) negative charge, C 10 0 . 8 q 8 - × - = ;. Answer__________ 2) Rank the paths according to the work done by the electric field of the sphere on each electron, greatest first. A) 1, 2, 3;
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Exam 2 2004 - PH 132 Exam 2 Spring 2004 Student Name...

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