ph132s04_exam1 - PH 132 Exam 1 Spring 2004 Student Name_...

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1 PH 132 Exam 1 Spring 2004 Student Name____________________________________________________ Student Number__________________________________________________ Lab/Recitation Section Number______________________________(11,…,34) Instructions: 1. Fill out all of the information requested 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. The electric field at the origin of the following half ring of total charge q + and radius R is: j R kq E ˆ 2 2 π = v x y R +q E Multiple Choice________ Problem 1_____________ Problem 2_____________ Total _________________
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2 Multiple Choice (2 pts. each) 1) Two point charges are fixed in space: a particle of charge q q 8 1 + = located at the origin and a particle of charge q q 2 2 - = located at x = L . At what point (other than infinitely far away) can a proton be placed so that it is in equilibrium? L 1 q 0 + 2 q x A) L x 3 - = , B) L x 2 3 - = , C) L x 3 2 = , D) L x 2 = . Answer__________ 2) Two identical conducting spheres A and B are separated by a (center-to-center) distance d that is large compared to the spheres. Sphere A has a positive charge of +Q, and sphere B is electrically neutral. Initially, there is no electrostatic force between the spheres. (Assume that there is no induced charge on the spheres because of the large separation). The spheres are connected for a moment by a thin conducting wire. What is the magnitude of the electrostatic force between the spheres after the wire is removed? A)
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This note was uploaded on 11/04/2009 for the course PHYSICS 132 taught by Professor Wick during the Spring '09 term at Clarkson University .

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ph132s04_exam1 - PH 132 Exam 1 Spring 2004 Student Name_...

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