Lect16 - Physics 212 Lecture 16, Slide Physics 212 Lecture...

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

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Physics 212 Lecture 16, Slide Physics 212 Lecture 16, Slide 1 Physics 212 Physics 212 Lecture 16 Lecture 16 Motional EMF Induced emf !! Induced emf !! Conductors moving in B field Conductors moving in B field 10 20 30 40 50 Avg = 2.7 Avg = 2.7 Confused Confused Confident Confident Physics 212 Lecture 16, Slide Physics 212 Lecture 16, Slide 2 Music Who is the Artist? Who is the Artist? A) A) Susan Tedeschi Susan Tedeschi B) B) Marcia Ball Marcia Ball C) C) Shawn Colvin Shawn Colvin D) D) Bonnie Raitt Bonnie Raitt E) E) Melissa Etheridge Melissa Etheridge I guess Im in a bluesy I guess Im in a bluesy mood this week mood this week Wonderful albums Wonderful albums Physics 212 Lecture 16, Slide Physics 212 Lecture 16, Slide 3 Physics 212 Physics 212 Lecture 16 Lecture 16 Motional EMF Induced emf !! Induced emf !! Conductors moving in B field Conductors moving in B field 10 20 30 40 50 Avg = 2.7 Avg = 2.7 Confused Confused Confident Confident Physics 212 Lecture 16, Slide Physics 212 Lecture 16, Slide 4 The Big Idea When a conductor moves through a region containg a magnetic field: Magnetic forces may be exerted on the charge carriers in the conductor 05 v These forces produce a charge separation in the conductor X X X X X X X X X X X X X X X X X X B X X X X X X X X X X X X X X X X X X +- F F This charge distribution creates an electric field in the conductor The equilibrium distribution is reached when the forces from the electric and magnetic fields cancel The equilibrium electric field produces a potential difference (emf) in the conductor B v q F = +- +- E +- E + F F E qE qvB = vB E = EL V = L vBL V = Physics 212 Lecture 16, Slide Physics 212 Lecture 16, Slide 5 Rotate picture by 90 Rotate picture by 90 o v X X X X X X X X X X X X X X X X X X B X X X X X X X X X X X X X X X X X X X v b a :22 BB BB Bar a Bar a No force on charges No charge separation No E field No emf Preflight 2 A B C D +- Fa = 0 = 0 +- F F Fb = qvB = qvB Bar b Bar b Opposite forces on charges Charge separation E = vB emf = EL = vBL Physics 212 Lecture 16, Slide Physics 212 Lecture 16, Slide 6 :22 BB BB Rotate picture by 90 Rotate picture by 90 o A B C D v0 X X X X X X X X X X X X X X X X X X B X X X X X X X X X X X X X X X X X X +- F F Fb = qv = qv 0B Bar Bar Opposite forces on charges...
View Full Document

Page1 / 23

Lect16 - Physics 212 Lecture 16, Slide Physics 212 Lecture...

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