lecture14 - Hour Exam II Monday March 15 Material covered...

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Hour Exam II Monday, March 15 Material covered lectures through 12 (but no RLC!) discussions through 6 homework through 6 labs through 5 Review, Sunday March 14, 3-4:30, room 141 will go over Spring 2009 Exam (Daylight Saving Time on Sunday!!)

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Resonance Electromagnetic Waves Physics 102: Lecture 14
RLC Review: Impedance Triangle and Resonance 7 R (X L -X C ) Z φ X L and X C point opposite. When adding, they tend to cancel! When X L = X C they completely cancel and Z = R. This is resonance! V max,gen = I max Z I max (X L -X C ) I max X L I max X C I max R V g e n , m a x φ L R C

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Resonance Resonance in AC Circuits frequency Impedance R is independent of f R 10
Resonance Resonance in AC Circuits frequency Impedance R is independent of f X L increases with f fL 2 π = L X R X L 10

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Resonance Resonance in AC Circuits frequency Impedance R is independent of f X L increases with f X C increases with 1/f fL 2 π = L X fC 2 1 = C X R X C 10 X L
Resonance Resonance in AC Circuits frequency Impedance R is independent of f X L increases with f X C increases with 1/f Z: X L and X C subtract fL 2 π = L X 2 2 ) ( C L X X R Z - + = fC 2 1 = C X R X C Z Resonance: X L = X C LC 2 1 f 0 = 10 X L f 0 Z is minimum at resonance frequency!

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Resonance in AC Circuits frequency R is independent of f X L increases with f X C increases with 1/f Z: X L and X C subtract fL 2 π = L X 2 2 ) ( C L X X R Z - + = fC 2 1 = C X Current Z f 0 11 Resonance: X L = X C LC 2 1 f 0 = Current is maximum at gen,max /Z
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lecture14 - Hour Exam II Monday March 15 Material covered...

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