lecture25-fall2011

lecture25-fall2011 - PHYS 272 Matter and Interactions II...

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Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lec25 Slide 1/23 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 25 Faraday’s Law [Chap 23] Ampere-Maxwell Law and Maxwell Equations [Chap 24]
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Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lec25 Slide 2/23 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Maxwell’s equations law) Maxwell - Ampere of version e (incomplet law s Ampere' law s Faraday' ˆ magnetism for law s Gauss' 0 ˆ y electricit for law s Gauss' ˆ 0 0 = - = = = path inside inside I l d B dA n B dt d l d E dA n B q dA n E μ ε Faraday’s law Solve E from rate of B-flux change, as solving B from current
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Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lec25 Slide 3/23 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/
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Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lec25 Slide 4/23 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Clicker Q1 A) B) C)
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Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lec25 Slide 5/23 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Clicker Q1 A) B) C) A
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Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lec25 Slide 6/23 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Changing the current in a coil can “induce” an emf in a second coil. An attempt to change the current in a coil leads to an additional emf in the coil itself . 2 2 0 R d N L π μ = 1 1 2 2 emf N N emf =
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Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lec25 Slide 7/23 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/
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