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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 (2)

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Post by Riley Argue on November 1, 2012

Thank you

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Post by malika eradi on December 2, 2011


Circuit Oscillation

  • If a charged oscillator is connected to an inductor, charge begins to flow in the circuit. As time goes by, charge decreases on the capacitor while the current increases; hence the electric energy stored in the capacitor decreases while the magnetic energy stored in the inductor increases. Eventually, all the electric energy is transferred to the magnetic energy. As time goes by, the magnetic energy is lost in favor of the electric energy, and so on so forth. What we end up with is circuit oscillations whereby energy is continually converted form electric to magnetic and vice versa.
  • The circuit oscillations are similar to the oscillations in a spring-block system where energy is continually converted from elastic energy to kinetic energy and vice versa.
  • The angular frequency of the LC circuit oscillations is w = ( 1 / LC )^1/2.

Circuit Oscillation

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
  • Oscillation in LC Circuit: Qualitative Analysis 0:30
    • Circuit with Capacitance and Inductance
  • Comparison with a Spring Block System 4:57
    • Close the Switch, Let the Block Move
    • At V=0
  • LC Circuit Oscillation :Quantitative Analysis 15:07
    • U Total = Ue + U m
  • Example RLC 29:25
    • Battery =12V, Capacitor and Inductor
    • Switch at B F> t
    • Damped Oscillation
  • Example 1: LC Circuit 1
  • Example 2: LC Circuit 2
  • Example 3: RLC Circuit