5408Exam1Blank

# 5408Exam1Blank - Physics 54 S08 Exam 1 Name Part I Short...

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Physics 54 S08 Exam 1 Name Section: Part I: Short Answer (3pts each) Circle the best answer: +2C -3 C q x y 1) A positive charge q is located on a line midway between +2 C and – 3 C charges and is equidistant from each of them as shown. The net force on q from the two charges a) has a negative x-component and a negative y-component. b) has a negative x-component and a positive y-component. c) has a positive x-component and positive y-component. d) has a positive x-component and a negative y-component. -q 2) A hollow conducting sphere with a net charge of Q has a charge -q inside located off center. The charge on the outer surface of the sphere is: a) Q - q. b) Q + q c) Q d) q

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1 1 3) Two graphite resistors with identical resistivity are shown. Which has the larger resistance? (numbers denote sizes in mm) a) The left one. b) The right one. c) Cannot determine. d) Both have the same resistance. 4) Two large area insulators are uniformly charged with total charges as shown. The electric potential is highest at point a.) a. b) b. c) c. d) cannot be determined for insulators. 5 10 1 2 -4 C +2 C a c b
C eq C C C C 5) The equivalent capacitance of the combination on the left is: a) 2C/3.

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## This note was uploaded on 05/13/2010 for the course PHYSICS 54L taught by Professor Thomas during the Spring '09 term at Duke.

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5408Exam1Blank - Physics 54 S08 Exam 1 Name Part I Short...

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