TAMU PHYS 202 - 208Exam1spring15A (7 pages)

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208Exam1spring15A



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208Exam1spring15A

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Pages:
7
School:
Texas A&M University
Course:
Phys 202 - College Physics

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Physics 208 Spring 2015 Exam 1 A Name Last First ID Section You have 75 minutes to complete the exam Formulae are provided on a separate colored sheet You may NOT use any other formula sheet You may use only a simple calculator one without memory or with a memory demonstrated to be cleared When calculating numerical values be sure to keep track of units Results must include proper units Be alert to the number of significant figures in the information given Results must have the correct number of significant figures If you are unable to solve part of a problem whose solution is needed in another part of the problem then assign a symbol for the solution of the first part and use that symbol in solving the second later part of the problem If you need additional space to answer a problem use the back of the sheet it is written on AND ensure to note on the main page of the problem that you have continued your work overleaf Also Show your work Without supporting work the answer alone is worth nothing Mark your answers clearly by drawing boxes around them This booklet has 7 pages DO NOT remove any sheets Please write clearly You may gain marks for a partially correct calculation if your work can be deciphered Page 1 of 7 Multiple Choice Problem 1 Problem 2 Problem 3 Problem 4 TOTAL 20 points 20 points 20 points 20 points 100 points 20 points MULTIPLE CHOICE Clearly mark the correct option s Each MC 5 points Total 20 points 1 A net positive charge is placed on a conducting parallelepiped The length of all sides of the parallelepiped is Consider the three Gaussian surfaces a cubic surface a parallelepiped and a spherically symmetric surface as shown in figures labeled A B and C below Fig A Fig B Fig C Which of the following are correct statements for the magnitude of the E field at point P that is located a distance 2 from the center of the conducting parallelepiped as shown in the figures above In the options below represents the surface charge density and if we choose the Gaussian surface in figure A i The E field at P is ii The E field at P is iii The E field at P is iv The E field at P is v The E field at P can only be vi None of the above Gaussian surfaces can be used to estimate the E field at point P vii The E field at Point P is zero because the charges are in the inner parallelepiped and not ON the Gaussian surface if we choose the Gaussian surface in figure A if we choose the Gaussian surface in figure B if we choose the Gaussian surface in figure B if we choose the Gaussian surface in figure C Page 2 of 7 2 Four point charges with a net charge of zero are placed



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