p240_ct8_f07 - Physics 240 Fall 2007 Lecture #8 Dr. Dave...

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Unformatted text preview: Physics 240 Fall 2007 Lecture #8 Dr. Dave Winn 2405 Randall Lab winn@umich.edu First exam next Thursday night, October 4, 8:00-9:30 Information on Exam #1 First exam next Thursday night, Oct. 4, from 8:00- 9:30 Covers chapters 21-24.3 (no dielectrics) Locations based on discussion sections, announced Tuesday and via email and web You will be asked to present your ID when you turn in the exam Exam will include 20 multiple choice questions based on MP, discussion, and in class work. Bring calculator, 3x5 note card (both sides), and #2 pencil Practice exam will be available this weekend, announced by email, and available on the web Visualizing Field and Potential Field lines show direction of force on a positive charge Density of field lines show strength of field, point downhill on potential Equipotentials show curves of constant potential. They are perpendicular to field lines Spacing of equipotentials shows strength of field: close lines => steep slope => strong field What is potential from a system? To find the potential due to a system of charges, just add the potentials from each charge in the system This is ~easy because potential is a scalar quantity!...
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This note was uploaded on 04/04/2008 for the course PHYSICS 240 taught by Professor Davewinn during the Fall '08 term at University of Michigan.

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p240_ct8_f07 - Physics 240 Fall 2007 Lecture #8 Dr. Dave...

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