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PHYS 142 Practice Test No. 2

# PHYS 142 Practice Test No. 2 - Physics 142 000 Spring 2008...

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1 d d P Physics 142 000 Practice Test No. 2 Name Spring 2008 ID There is no partial credit on multiple choice questions. Please circle one number (1, 2, 3…) for each question to indicate your response. There will be partial credit on free response questions. Your work as well as your result will be evaluated. Your answers must be given to the appropriate number of significant figures. All questions have the same value. You must have your own calculator; you may not share a calculator with anyone. You are allowed two 4 × 6 inch index cards with your own hand-written notes on both sides. I pledge, by signing below, that I will faithfully abide by the provisions and spirit of the Emory College Honor Code in my completion of this Test. Signature Date μ o = 4 π × 10 -7 H/m 1. The four long straight wires carry currents of the same magnitude. The currents in wires 1, 3 and 4 are out of the page and the current in wire 2 is into the page. What is the direction of the magnetic force experienced by wire 2? 1 . 2 . 3 . 4 . 5 . 2. The picture shows two wires each carrying a current of 8.5 A, but in opposite directions. The distance d = 0.36 m. Calculate the magnitude of the magnetic field at point P . 1. 1.5

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PHYS 142 Practice Test No. 2 - Physics 142 000 Spring 2008...

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