lecture18 - PHYS 272: Matter and Interactions II - Electric...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lec18 Slide 1/25 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 18 RC Circuits [EMI Chap. 20.6] Magnetic Force [Chap. 21] Reminder: Exam 2 Wednesday 11/03 8-9:30pm in Rm 112/114 (Exam 2 will cover Chap 17-20 or Lec. 7-17/18) [20 Choice Questions Similar to HomeWork Problems]
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lec18 Slide 2/25 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Electric field in a capacitor: 0 / A Q E E s +Q -Q f i l d E V Es V s A Q V 0 / V s A Q 0 V Q ~ In general: Definition of capacitance: V C Q Capacitance Capacitance of a parallel- plate capacitor: s A C 0 Capacitance Units: C/V, Farads (F) s A K C 0
Background image of page 2
Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lec18 Slide 3/25 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Conventional current: nAuE q v nA q I Different properties of the material Geometry Group the material properties together: I q nu AE J I A q nu r E r E (A/m 2 ) Current density: Conductivity m V A nu q Conductivity Combining the properties of a material
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lec18 Slide 4/25 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ f i l d E V EL V L V E E A I J AE I R V V R V L A I 1 Conventional current: R V I Widely known as Ohm’s law Resistance of a long wire: A L R Units: Ohm, Resistance Resistance combines conductivity and geometry!
Background image of page 4
Fall 2010 Prof. Yong Chen ( [email protected] ) Prof. Michael Manfra ( [email protected] ) Lec18 Slide 5/25 PHYS 272: Matter and Interactions II -- Electric And Magnetic Interactions http://www.physics.purdue.edu/academic_programs/courses/phys272/ Current: charges are moving work is done V q U e Work = change in electric potential energy of charges Power = work per unit time: V t V q t U P e I P I V Power for any kind of circuit component: Work and Power in a Circuit W s J C J s C AV Units:
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Fall 2010 Prof. Yong Chen (
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

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.

Page1 / 25

lecture18 - PHYS 272: Matter and Interactions II - Electric...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online