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fa10test3

# fa10test3 - Name Instructor Louisiana State University...

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Name: _______________________ Instructor:__________________ Louisiana State University Physics 2102, Exam 3, November 11, 2010. Please be sure to write your name and class instructor above. The test consists of 3 questions (multiple choice), and 4 problems (numerical). All numerical quantities must have appropriate units. Points will be deducted if units are absent. For the problems: Show your reasoning and your work – no credit will be given for an answer without explanation or work . Note that in many of the problems, you can do parts (b) or (c) even if you get stuck on (a) or (b). You may use scientific or graphing calculators. Cell phones cannot be used as calculators. Feel free to detach, use, and keep the formula sheet pages. No other reference material is allowed during the exam. Good Luck!

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Problem 1 [20 points] A long cylindrical wire of diameter 1.0 cm carries a total current of 75 A uniformly distributed over its cross section. (a) [5 pts] Calculate the current density in the wire: (b) [8 pts] At what distance from the axis of the wire, but still inside the wire
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fa10test3 - Name Instructor Louisiana State University...

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