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For more information, please see full course syllabus of AP Physics C/Electricity and Magnetism
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Lecture Comments (5)

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Post by Emrah DaÄŸdelen on May 8, 2013

I don't know how to thank you..Really you are perfect..Thank you..

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Post by spencer frame on March 17, 2013

i agree i get great marks in university, and dont go to class because the teachers on here are so great!

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Post by Edwin Ramon on November 24, 2012

Yeah! :)

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Post by Herve Gnidehoue on December 27, 2011

Awesome professor ! The examples provide a deep insight into the concept of the magnetic force and also the power of the integral.

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Post by yasser algoufily on December 2, 2010

This is really great, you guys are the best.
I like how he solves practical examples after illustrating the physical concepts of the lesson.

Magnetic Force on a Current Carrying Conductor

  • A magnetic field exerts a force on a conductor carrying a current. If the wire is straight, and the field is uniform, the force is given by F = I L x B, where I is the current, L is a vector whose magnitude is the length of the conductor and whose direction is the same as the direction of the current, and B is the magnetic field vector.
  • If the shape of the wire is arbitrary, the force on a segment ds of the wire is dF = I ds x B. The total force on the wire is obtained by integrating dF over the length of the wire.

Magnetic Force on a Current Carrying Conductor

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Current Carrying Conductor in a Magnetic Field 0:19
    • Current Though the Wire Connected to Battery
    • Current Exerts Force Toward the Left
    • IF Current is Reversed ,Force Exerts on Right
  • Magnetic Force 3:31
    • Wire with Current 'I' and with magnetic Field
    • Force Exerted by Magnetic field
    • Applying right hand Rule
    • Let N be Number of Charge Carries Per /Vol
    • Force on Wire
    • Number of Charge Crossing in Time 't'
  • Example 22:32
    • Wire Bent to Semi Circle and Rest is Straight
    • Applying Constant Magnetic Field in 'y' Direction
    • Force n Straight Segment
    • Net Force
  • Example 1: Rod on Rails
  • Example 2: Magnetic Force on Wire