Lecture05 - Fall 2010 Prof. Yong Chen ( yongchen@purdue.edu...

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Unformatted text preview: Fall 2010 Prof. Yong Chen ( yongchen@purdue.edu ) Prof. Michael Manfra ( mmanfra@purdue.edu ) Lecture 5 Slide 1 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ PHYSICS 272 Electric & Magnetic Interactions Lecture 5 Charging/Discharging; E-field of distributed charges: charged rod and ring [EMI 15.7;16.1-16.4] Fall 2010 Prof. Yong Chen ( yongchen@purdue.edu ) Prof. Michael Manfra ( mmanfra@purdue.edu ) Lecture 5 Slide 2 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ A few reminders If you have problems/issues with your iClicker, please see VK Saxena (Office: PHYS 176; Phone: 4-9575; Email: saxena@purdue.edu) iClicker code is CD for each lecture, keep power ON Saxena is also the person you should see if you have questions on WebAssign or CHIP. HW help/questions: Help Center, TA, Saxena, Prof. Fall 2010 Prof. Yong Chen ( yongchen@purdue.edu ) Prof. Michael Manfra ( mmanfra@purdue.edu ) Lecture 5 Slide 3 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Last time Insulators and Conductors What is E-field inside How do they interact with E-field What happen to charges/dipoles polarization Charging and Discharging Fall 2010 Prof. Yong Chen ( yongchen@purdue.edu ) Prof. Michael Manfra ( mmanfra@purdue.edu ) Lecture 5 Slide 4 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Equilibrium condition inside a conductor: The drift is often stopped by collisions. 0) ( E v Note: Later in the course, we will discuss DC current flowing in conductors--- thats a static but non-equilibrium situation [there can be E inside] Fall 2010 Prof. Yong Chen ( yongchen@purdue.edu ) Prof. Michael Manfra ( mmanfra@purdue.edu ) Lecture 5 Slide 5 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Introduce this concept to metal : Drude Model E - net net E e F t p ) ( e net e net m t eE m p v t eE p p No net interaction between mobile electrons Forget previous velocity after collision e net e m t e E m t e v (mobility) Later we will show that conductivity ( ) Some important sources of collision:- impurities- thermal motion of atoms (more motion at higher temperature T shorter lower [common feature of metals]) t Fall 2010 Prof. Yong Chen ( yongchen@purdue.edu ) Prof. Michael Manfra ( mmanfra@purdue.edu ) Lecture 5 Slide 6 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ dipoles...
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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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Lecture05 - Fall 2010 Prof. Yong Chen ( yongchen@purdue.edu...

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