Exam 3 2004

Exam 3 2004 - PH 132 Exam 3 Spring 2004 Student Name_...

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1 PH 132 Exam 3 Spring 2004 Student Name____________________________________________________ Student Number__________________________________________________ Lab/Recitation Section Number______________________________(11,…,35) Instructions: 1. Fill out all the information above. Write your name on each page. 2. Clearly indicate your final answers for all multiple-choice questions in the space provided. 3. Present neat and orderly solutions to each problem. Clearly indicate your method of solution by including equations used for each part. Final answers should be circled or boxed . 4. Be sure to include appropriate units with all answers. 5. Permittivity of free space: ε o = × - 885 10 12 . C N m 2 2 . Permeability of free space: μ o A = × - 126 10 6 . T m Multiple Choice________ Problem 1_____________ Problem 2_____________ Total _________________
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2 Multiple Choice (2 pts. each) 1) A closed rectangular loop of wire carrying a current I 1 is placed next to a long straight wire carrying a current I 2 . Which statement is true concerning the net force and net torque acting on the loop? I 1 I 2 A) 0 , 0 F NET = = NET τ v v ; B) 0 , 0 F NET = NET v v ; C) 0 , 0 F NET = NET v v ; D) 0 , 0 F NET NET v v ; Answer__________ 2) An “S” shaped piece of wire is made from two semicircular arcs of radius 1.0 m. The wire carries a 3.0 A current in a uniform 2.0 mT magnetic field, directed as shown. The magnitude and direction of the net magnetic force acting on this wire is I B A) 24 mN into the page; B) 24 mN out of the page; C) 38 mN into the page; D) 38 mN out of the page. Answer__________
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3 3)
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Exam 3 2004 - PH 132 Exam 3 Spring 2004 Student Name_...

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