This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: samani (nms654) H7MagnFields Avram (1956) 1 This printout should have 46 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 10.0 points The current in the wire shown in the figure is 20 A. 1 cm 2 cm P 20 A Find the net magnetic field at point P . The permeability of free space is 4 10 7 T m / A. Answer in units of T. 002 (part 1 of 2) 10.0 points Consider the application of the BiotSavart law vector B = 4 I vector r r 2 . Consider the magnetic field at O due to the current segments B B +semicircle+ CC . The length of the linear segments, B B = CC = d . The semicircle has a radius R . x y I I I 180 O R B B C C A The magnetic field B O at the origin O due to the current through this path is 1. out of the page. 2. into the page. 3. undetermined, since B = 0 . 003 (part 2 of 2) 10.0 points At O , the magnitude of the magnetic field due to the current segments described above is given by 1. B O = I 2 R 2. B O = I 4 R 3. B O = I 2 R 4. B O = I 4 R 5. B O = I 2 R 6. B O = I R 7. B O = 0 8. B O = I R 9. B O = I 4 R 10. B O = I R 004 10.0 points The closed loop shown in the figure carries a current of 20 A in the counterclockwise direc tion. The radius of the outer arc is 60 cm , that of the inner arc is 40 cm . Both arcs ex tent an angle of 60 . The permeability of free space is 4 10 7 T m / A. 4 c m C B 6 c m D A O 60 y z Find the component of the magnetic field at point O along the x axis. Answer in units of T . 005 (part 1 of 2) 10.0 points A closed circuit consists of two semicircles of samani (nms654) H7MagnFields Avram (1956) 2 radii 58 cm and 30 cm that are connected by straight segments, as shown in the figure. A current of I = 6 A flows around this circuit in the clockwise direction. The permeability of free space is 4 10 7 T m / A. O 3 c m 5 8 c m k is upward from the paper I = 6 A I What is the direction of the magnetic field B at point O . 1. None of these are true. 2. vector B bardbl vector B bardbl = 3. vector B bardbl vector B bardbl = + k 4. vector B bardbl vector B bardbl = + 5. vector B bardbl vector B bardbl = + 6. vector B bardbl vector B bardbl = k 7. vector B bardbl vector B bardbl = 006 (part 2 of 2) 10.0 points Find the magnitude of the magnetic field at point at point O . Answer in units of T. 007 10.0 points A circular loop of wire of radius R = 3 . 98 m lies in the xyplane, centered about the origin. The loop is carrying a current of I = 9 . 04 A flowing in counterclockwise direction....
View
Full
Document
This note was uploaded on 02/26/2012 for the course PHYSICS 302K taught by Professor Irenepolycarpou during the Spring '09 term at University of Texas at Austin.
 Spring '09
 IRENEPOLYCARPOU

Click to edit the document details