HW__8_P2213_S09

# HW__8_P2213_S09 - Physics 2213 Read Homework#8 Spring 2009...

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Physics 2213 Homework #8 Spring 2009 Read: Chapter 28, intro., sections 28.2 thru 28.7 Learning Goals: (Be sure you understand where and how each goal in each assignment applies to our homework, discussion, lecture, and lab activities.) * Use the Biot-Savart Law and integration to determine magnetic fields from simple electric current distributions — straight lines or line segments, circular loops or arcs. * Use symmetry to deduce geometric properties of magnetic fields due to specific sources and sketch their magnetic field lines. * Use Ampere's Law to determine magnetic fields due to electric current systems of sufficiently high symmetry — long straight wires, solenoids, toroids, planar sheets. * Use the Principle of Superposition, along with integration as needed, to determine the net magnetic field produced by combinations of magnetic field sources. * Calculate magnetic field values from electric current values and vice-versa. * Translate an equation for a magnetic field as a function of position into a graph conceptually (without detailed calculations) in any dimension. * Determine magnetic forces between current-carrying wires and loops. * Use the various forms of the Right-Hand Rule to relate magnetic field, electric current directions, and magnetic forces. * Use the analogies between current loops, solenoids, and permanent magnets to deduce properties of magnetic fields and forces produced by current loops and solenoids. For extra practice: Chap. 28: Q's #Q28.1-3, 5-15 (not quizzed) E's & P's #28.9, 13, 21, 25, 31, 33, 39, 45, 63, 69 To be prepared for Wednesday-Friday, Mar. 25-27, at your 2nd weekly Discussion section: #28.60 [Two Wires] #28.69 & 70 [Superposition Principle] Use the Biot-Savart Law to justify your results. #28.74 [Thick Cylindrical Shell] Please add: (c) Draw a graph of the magnetic field B(r) vs. distance r from the axis of the cylinder from r = 0 to r > c. #28.81 [Flat Current Sheet] HINT: What does symmetry tell you about the directions and magnitudes of the magnetic fields above and below the current sheet? #1. A rectangular wire loop of dimensions D and H that carries electric current I 2 is situated a distance y directly beneath a long straight horizontal wire that carries current I 1 , as shown . (a)

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HW__8_P2213_S09 - Physics 2213 Read Homework#8 Spring 2009...

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