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Unformatted text preview: 1 Lecture 19 Chapter 21. Magnetic Force Announcement: See next slide about Exam 2. 3/22/11 2 Exam 2 Wednesday March 30th, 2011 from 8 PM  10 PM in PHYS 114 *Covers all readings, lectures, homework from Chapters 17 through 19 *The exam will be multiple choice and is meant to be done within 75 minutes by a wellprepared student. We will give 120 minutes starting promptly at the listed time, so please be on time! Be sure to bring your student ID card , calculator, and pencil. 3/22/11 3 Lorentz !'PSDFT F = q E + q v × B F B = q v × B F = q vB sin φ 3/22/11 4 Right Hand Rule Direction of F B is perpendicular to plane containing v & B . If q is positive, F B has the same sign as v x B . If q is negative, F B has the opposite sign of v x B . F B is never parallel to v . F B can only change the direction of the particle not the speed. 2 3/22/11 5 Magnetic Force on a CurrentCarrying Wire Force between Two Parallel Current Carrying Wires *Parallel currents attract *Antiparallel currents repel...
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This note was uploaded on 04/23/2011 for the course PHYS 272 taught by Professor K during the Spring '07 term at Purdue.
 Spring '07
 k
 Force, Work

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