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# db_lec10_post - Exam 1(Wednesday Feb 15 8:00-9:30...

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2/12/12 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. PHYS 221 D. Bortoletto

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2/12/12 2 Exam 1 Preparation * Practice exam is available in CHIP (no points given to complete) * Lecture on February 15 is cancelled * We will have a practice session during the time schedule for the lecture PHYS 221 D. Bortoletto
PHYS 221Lecture 10 2/12/12 D. Bortoletto PHYS221 3 Previous lecture: 1. Magnetic field and Magnetic force 2. Magnetic Force on a moving charge 3. Magnetic Force on wire carrying an electric current This lecture: 1. Torque 2. Ampere’s law sin B F ILB θ = Direction given by RHR F B = q v × B F B = qvB sin θ

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The right hand rule 2/12/12 D. Bortoletto PHYS221 4
2/12/12 5 x x x x x x x x x x x x x x x x x x q Suppose charge q enters B field with velocity v as shown below.

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