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Unformatted text preview: Richard Hallstein PHY232/232C Fall 2010 1 Practice 2 Hallstein, Richard Keep this exam CLOSED until advised by the instructor. Fill out the bubble sheet: last name, first initial and student number. 60 minute long closed book exam. A twosided 8.5 by 11 handwritten help sheet is allowed. When done, hand in your bubble sheet and your exam . Possibly useful constants: k e = 8.99 10 9 Nm 2 /C 2 = 8.85 1012 As/(Vm) = 4 107 Vs/(Am) c = 3.00 10 8 m/s g = 9.81 m/s 2 G = 6.67 1011 Nm 2 /kg 2 e = 1.60 1019 C m e = 9.11 1031 kg m e c 2 = 0.511 MeV h = 6.63 1034 Js h = 4.14 1015 eVs hc = 1240 eVnm = 5.67 108 W/(m 2 K 4 ) Wiens constant = 2.898 103 Km R H = 1.097 10 7 1/m E = 13.6 eV a = 0.529 Angstrom 1 eV = 1.60 1019 J 1 AMU (1 u) = 931.494 MeV/c 2 = 1.67 1027 kg Field directly into page. Field directly out of page 1 pico (p) = 1012 [email protected] Richard Hallstein PHY232/232C Fall 2010 3 Practice 2 4 pt In the figure below, the bottom wire carries a current of 5.0 A. The current of the upper wire is directed in the opposite direction, and the total magnetic field at point p 1 is zero. 1 I 2 p 2 p 1 I a a a What is the current in the top wire? (in A ) 1. A circlecopyrt 2.34 B circlecopyrt 3.39 C circlecopyrt 4.92 D circlecopyrt 7.13 E circlecopyrt 1 . 03 10 1 F circlecopyrt 1 . 50 10 1 G circlecopyrt 2 . 18 10 1 H circlecopyrt 3 . 15 10 1 4 pt Given that the wires are separated by 2a, where a = 0.021 m, what is the magnitude of the magnetic field at point p 2 ?...
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This note was uploaded on 04/08/2011 for the course PHY 232 taught by Professor Mr.nagy during the Spring '06 term at Michigan State University.
 Spring '06
 MR.Nagy
 Physics

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