# Lecture08 - PHYS 272: Matter and Interactions II - Electric...

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Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 8 Slide 1 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ PHYSICS 272 Lecture 8 Electric Potentials [EMI 17.3-17.6] Reminder about Exam1! (covers Chap 14-16; closed book; equation sheet will be provided) [DOS-approved Special Accommodation Students Exam Room: PHYS 72, starting 7:30pm] See Course web for details

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Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 8 Slide 2 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Electric potential electric potential energy per unit charge q U V el Units: J/C = V (Volt) Electric potential – often called potential Electric potential difference – often called voltage Electric Potential Volts per meter = Newtons per Coulomb [E-field] Alessandro Volta (1745 - 1827)
Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 8 Slide 3 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ l E q V q U W U U i f ) ( i f E l i f V V Potential energy is ability to do work

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Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 8 Slide 4 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Path going in the direction of : Potential is decreasing ( V < 0) E Path going opposite to : Potential is increasing ( V > 0) E Path perpendicular to : Potential does not change ( V = 0) E Sign of potential difference E
Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 8 Slide 5 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ 20 20

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Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 8 Slide 6 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ ) mm 2 ( V 500 E l E V V If the proton reaches the left side J 10 8 eV 500 17 - V e U U J 10 4 . 3 ) 10 2 ( ) 10 7 . 1 ( 5 . 0
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## This note was uploaded on 02/02/2012 for the course STAT stat512 taught by Professor Libo during the Spring '11 term at Purdue North Central.

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Lecture08 - PHYS 272: Matter and Interactions II - Electric...

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