Lecture08fall2011a

Lecture08fall2011a - Fall 2010 Prof Yong Chen...

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Unformatted text preview: Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 7 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 8 E-field of capacitors; spheres Electric Potentials [EMI 16.7; 17.1-17.3] Reminder about Exam1! Tonight 8-9:30pm in PHYS 112 & 114 (covers Chap 14-16; closed book; equation sheet will be provided) [DOS-approved Special Accommodation Students Exam Room: PHYS 72] Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 7 Slide 2 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 7 Slide 3 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ 2 / ] 2 / 1 [ / ] 2 [ 2 / ] 1 [ 2 / ] 1 [ 2 / ε ε ε ε ε A Q R s A Q R s A Q R z s A Q R z A Q E- ≈-- ≈-- ≈----- ≈ S z z O z E E ˆ = ] 1 [ 2 / , R z A Q E R z z- ≈ < < < < ε E- E + E net Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 7 Slide 4 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ ) ( 2 / ] 1 [ 2 / ] 1 [ 2 / 3 R s A Q R z A Q R s z A Q E ε ε ε ≈---- ≈ S z z O E- E + Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 7 Slide 5 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ ) ( 2 / ] 1 [ 2 / ] 1 [ 2 / 3 R s A Q R z A Q R s z A Q E ε ε ε ≈---- ≈ S z z O E- E + ) ( 2 / 1 R s A Q E ε ≈ Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 7 Slide 6 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ E- E + E net s z E 2 ≈ Q / A ε E 1 = E 3 ≈ Q / A 2 ε s R Inside: Fringe: Capacitor + Q- Q s Independent of z Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 7 Slide 7 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Field inside: E =0 Field outside: r r Q E ˆ 4 1 2 πε = (like point charge) Uniform Spherical Shell of Charge Qualitative approach More Rigorous: Integration* or Gauss Law (later) Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lecture 7...
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This note was uploaded on 12/07/2011 for the course PHYS 272 taught by Professor K during the Fall '07 term at Purdue.

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Lecture08fall2011a - Fall 2010 Prof Yong Chen...

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