db_lec09_post

db_lec09_post - 1 Exam 1(Wednesday Feb 15 8:00-9:30 PM NOTE...

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Unformatted text preview: 2/7/12 1 Exam 1(Wednesday Feb. 15, 8:00-9:30 PM) NOTE THAT FEW EQUATIONS WILL BE GIVEN – YOU ARE REMINDED THAT IT IS YOUR RESPONSIBILITY TO CREATE WHATEVER TWO-SIDED CRIB SHEET YOU WANT TO BRING TO THIS EXAM. * Location STEW 183 *Covers all readings, lectures, homework from Chapters 17 through 20.4 *The exam will be multiple choice and is meant to be done within 60 minutes by a well-prepared student. We will give 90 minutes starting promptly at the listed time, so please be on time! Be sure to bring your student ID card , calculator, pencil and your own one- page (two-side) crib sheet. 2/7/12 2 Exam 1 Preparation * Practice exam is available in CHIP * Lecture on February 15 is cancelled * We will have a practice session during lecture 2/7/12 3 Magnetic Field • Large Magnetic fields are used in MRI (Nobel prize for medicine in 2003) • Extremely Large magnetic field are found in some stars • Earth has a Magnetic Field 2/7/12 4 Bar Magnets From North to South outside From South to North inside Always close on themselves N S N S Attraction S N N S Repulsion • Bar magnet ... two poles: N and S Like poles repel; Unlike poles attract. • Magnetic Field lines: (defined in same way as electric field lines, direction and density) 2/7/12 5 DEMO of Magnetic Field Lines Electric Field Lines of an Electric Dipole Magnetic Field Lines of a bar magnet + - 2/7/12 6 6 S N S N S N C B A ILQ 1 Which drawing shows the correct field lines for a bar magnet?...
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db_lec09_post - 1 Exam 1(Wednesday Feb 15 8:00-9:30 PM NOTE...

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