{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture24 - Lecture 24 Chapter 23 Faradays Law Faradays Law...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Lecture 24 Chapter 23. Faraday’s Law ‘Magnetic force’ approach: B v q E q F tot × + = = vB E L vB emf = I Use Faraday law: dt d emf mag Φ = A B mag Δ = ΔΦ t Lv B Δ = L vB t emf mag t Δ = Δ ΔΦ = 0 lim I Faraday’s Law and Motional EMF B 1 B 2 v L R dt d emf mag Φ = I Example 4/17/11 4 Eddy Currents *Relative motion between a B field and a conductor induces a current in the conductor. *The induced current give rises to a net magnetic force, F M , which opposes the motion.
Image of page 1

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

View Full Document Right Arrow Icon
2 4/17/11 5 Demonstration 6D-07 4/17/11 6 Eddy Currents 4/17/11 7 Demonstration: Eddy Currents 6D-08 4/17/11 8 Eddy Currents B field into the page v v Induced current anti-clockwise Induced current clockwise Flux increasing Flux decreasing F F x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x During the last lecture we considered currents confined to a loop or a coil. Electrical equipment contains other metal part which are often located in changing B fields. Currents in such parts are called Eddy currents
Image of page 2
3 4/17/11 9 Reduce Eddy Currents Metal strips with insulating glue
Image of page 3

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

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern