2006 Final Exam

2006 Final Exam - Physics 2220.004 Spring 2006 Final...

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Physics 2220.004 Spring 2006 Final Examination Name: This test consists of 9 multiple-choice questions and 7 free-response problems , for a total of 110 points (so that 10 points of extra credit are possible). To receive credit for the free-response problems, you must show all of your work on the pages provided. Don’t hand in any extra sheets or other paper. You may also earn partial credit for the some of the multiple choice problems if you show your work. Suggested procedure for solving the problems: 1. Read each problem carefully and make sure you know what is being asked before starting the problem. 2. Draw a figure for the problem. 3. List the parameters given. 4. Write down the equations to be used. 5. Solve for the answer symbolically. 6. Substitute numbers into you final equation and circle your answer. WORK THE EASY PROBLEMS FIRST!! 1. (4 points) When a conductor is in electrostatic equilibrium, the electric field on its surface will never be a) perpendicular to the surface. b) tangent to the surface. c) zero. d) proportional to the charge density on the surface. e) greatest where the radius of curvature of the surface is greatest. 2. (5) A charge Q = 5.00 nC is placed on a conducting ring of radius a = 20.0 cm. The electric potential at the center of the ring is a) 1.12 kV b) 25.0 V c) 125 V d) 225 V e) 1.41 kV
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3. (5) A wire with a resistance R is stretched out to 5 times its original length. (Its volume is
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This note was uploaded on 09/07/2010 for the course PHYS 2220 taught by Professor Littler during the Spring '00 term at North Texas.

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2006 Final Exam - Physics 2220.004 Spring 2006 Final...

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