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Unformatted text preview: Platt, David Homework 18 Due: Oct 21 2005, 4:00 am Inst: Ken Shih 1 This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. 001 (part 1 of 5) 10 points The current loop ABCDA carries current I in the direction indicated in the figure, where the segments AB and CD are concentric arcs with radii a and b respectively. a C B b D A O 60 x y What is the magnitude of the resultant magnetic field k ~ B k at the center of curva- ture O due to the current segment of arc CD ? 1. k ~ B CD k = I 12 1 b 2. k ~ B CD k = I 6 1 b 3. k ~ B CD k = I 24 1 b 2 4. k ~ B CD k = I 6 1 b 2 5. k ~ B CD k = 0 6. k ~ B CD k = I 12 1 b 2 7. k ~ B CD k = I 3 1 b 8. k ~ B CD k = I 3 1 b 2 9. k ~ B CD k = I 24 1 b 002 (part 2 of 5) 10 points What is the direction of the resultant mag- netic field ~ B at the center of curvature O due to the current segment of arc...
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