electromagnetism - Electromagnetism Lecture 07 Inductance...

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

View Full Document Right Arrow Icon
Electromagnetism Lecture 07: Inductance and LR Circuits (Knight: 33.8-33.10) x x x x x x x x x x x x x x x x x x v F B q →→→→→ →→→→→ v F B q × ↑↑↑↑↑↑↑↑ ↑↑↑↑↑↑↑↑ v F = 0 B q B v q E q F × + =
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
Physics 113 Dr. Renat Letfullin 2 Announcement: Test # 2 will be on Friday, April 6 th . Chapters: 33, 35
Image of page 2
Physics 113 Dr. Renat Letfullin 3 Energy in Inductors and Magnetic Fields The LR Circuits The LC Circuits Today.. .
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
Physics 113 Dr. Renat Letfullin 4 Energy in Inductors and Magnetic Fields A magnetic field stores considerableenergy. Therefore, an inductor, which operates by creating a magnetic field, stores energy. Let’s consider how much energy U L is stored in an inductor L carrying current I: dI dI P I V I L LI dt dt = = - = - 1 2 2 0 I L U L IdI LI = = A solenoid of length l , area A, and N turns has L = μ 0 N 2 A/ l , so: 2 2 1 2 2 0 0 2 0 2 0 1 2 2 1 2 L N A NI U LI I Al l l AlB μ μ μ μ = = = = 2 0 1 2 L B U u B Al μ = = 1 2 2 L U LI = 2 0 1 2 B u B μ =
Image of page 4
Physics 113 Dr. Renat Letfullin 5 The LR Circuit P 1 P 2 Pump Constriction Valve P 3 Flywheel
Image of page 5

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

View Full Document Right Arrow Icon
Physics 113 Dr. Renat Letfullin 6 LR circuits: Early and Late Initially, when a switch closes an inductor appears to havean infiniteresistanceand has a maximum potential drop across it. Ultimately, theinductor reaches a steady current flow and thereis no potential drop across it.
Image of page 6
Image of page 7
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