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33-06_fin - Physics 33 Final Exam Monday December 4 2006...

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Physics 33 Final Exam Name ________________________ Monday, December 4, 2006 This test is closed book, closed notes. You may use a 3” by 5” hand-written card. You may use a calculator. If any numerical values are given in a problem, a numeric answer is expected. FULL CREDIT WILL NOT BE GIVEN for answers that contain mathematical operations! For full credit, you must explain or show how your answers are obtained. Do not state the result of a homework, in-class, or textbook problem without proof! USE NO PHYSICAL CONSTANTS OTHER THAN THOSE GIVEN. For this test, you might need: μ 0 = 4 π x10 -7 Tm/A If you run out of room on a page: FLIP your test and continue writing. That is, if you run out of space on page N, continue on the back of page N - 1! This test consists of 6 numbered questions on 7 pages! 1 This cartoon is copyright protected (copyright © 2004 by Nick D. Kim) and reproduced without permission under a claim of fair use.
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Physics 33 Final Exam Name ________________________ Monday, December 4, 2006 1) (18 points) We found in class that the magnitude of the magnetic field a distance r from a long, straight wire carrying current i 0 is given by 0 0 2 i B r μ π = . Two long, straight wires are aligned in the x direction at y = –2 m and y = +2 m. Each carries a current i 0 = 3 A in the positive x direction as shown. In the picture, positive x and positive y are as shown, positive z points out of the page, and the origin (x = 0, y = 0, z = 0) is the point where the dashed lines cross.
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