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Final.sample - PHYSICS 132 Sample Final 200 points 5...

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Cover Page PHYSICS 132 Sample Final 200 points 5 Problems on 4 Pages and 20 Multiple Choice/Short Answer Questions on 5 pages 1 hour, 48 minutes Student Name: ________________________________ Recitation Instructor (circle one): name1 name2 name3 name4 Write your name and circle the name of your recitation instructor on every page. The pages of this exam will be separated and each page graded by a different instructor. You must have your name on each sheet to receive a grade. Show your work. Although an answer may seem obvious, you must still justify your results. Problem 1 _______ Problem 2 _______ Problem 3 _______ Problem 4 _______ M.C. _______ Total _______
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Physics 132, Sample Final Page Score _______ Name: _____________________ Recitation Instructor: name1 name2 name3 name4 Page 1 Problem 1, 25 points total. A long conducting cylindrical shell is concentric about a long wire. The shell has outer radius c and inner radius b, while the wire has radius a: a < b < c. The wire has a uniform current 5i into the page and the shell has a uniform current 8i out of the page. A cross-section of the arrangement is shown to the right. Use Ampere’s Law to answer the following questions. (a) What is the magnetic field, B (r), for r < a? (b) What is the magnetic field, B (r), for a < r < b? (c) What is the magnetic field, B (r), for r > c? (d) At what value of r does the magnetic field have the largest magnitude? b c a
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Physics 132, Sample Final Page Score _______ Name: _____________________ Recitation Instructor: name1 name2 name3 name4 Page 2 Problem 2, 13 points total. Consider the arrangement of wires shown in the figure. There are four straight sections and two sections that are quarter-circles that lie on a common circle of radius R. Point P is at the center of the circle. R = 2.0 m, i = 8.0 A. What is the magnetic field at location P? Problem 3, 13 points total. A long wire carrying a current 2i runs through the center of a long solenoid carrying a current 3i, as shown in cross-section. The solenoid has n turns per unit length. What is the magnetic field a distance d above the wire? P R 2i 3i d 3i 2i
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Physics 132, Sample Final Page Score _______ Name: _____________________ Recitation Instructor: name1 name2 name3 name4 Page 3 Problem 4, 24 points total. Three very long wires of length L lie parallel to each other, and are arranged through three of the vertices of a square with sides of length a. A cross-section of this arrangement is shown in the figure. The currents and their directions are marked. Neglect the effect of fringing fields.
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