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Lectures_Lect21

Lectures_Lect21 - Physics 212 Lecture 21 Physics 212...

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Physics 212  Lecture 21, Slide   Physics 212  Lecture 21, Slide  1 Physics 212 Physics 212 Lecture 21 Lecture 21

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Physics 212  Lecture 21, Slide   Physics 212  Lecture 21, Slide  2 I I max  X  X L I I max  X  X C I I max max  R  R L R C ε ε max max I I max max  R  R ε ε max max = = I I max  max  Z Z I I max max (X (X L -X -X C ) ) I I max max  X  X L I I max max  X  X C I I max max  R  R ϖ ϖ X L = = ϖ L X C = 1/ = 1/ ϖ C R R φ X X L - - X X C
Physics 212  Lecture 21, Slide   Physics 212  Lecture 21, Slide  3 Peak AC Problems “Ohms” Law for each element  PEAK values – V gen        =  I max  Z – V Resistor   = I max  R – V inductor   = I max  X L – V Capacitor   = I max  X C Problem A generator with peak voltage 15 volts and angular frequency 25 rad/sec is  connected in series with an 8 Henry inductor, a 0.4 mF capacitor and a 50  ohm resistor. What is the peak current through the circuit? 07 L R C 200  L X L ϖ = = 1 100  C X C ϖ = = ( 29 2 2 112  L C Z R X X = + - = A Z V I gen 13 . 0 max = = X X L X X C R R

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Physics 212  Lecture 21, Slide   Physics 212  Lecture 21, Slide  4 Peak AC Problems “Ohms” Law for each element – V gen = I Z – V Resistor = I R – V inductor = I X L – V Capacitor = I X C Typical Problem A generator with peak voltage 15 volts and angular frequency 25 rad/sec is connected in series with an 8  Henry inductor, a 0.004 Farad capacitor and a 50 ohm resistor. What is the peak current through the  circuit? Which element has the largest peak voltage across it? A) Generator E) All the same. B) Inductor C) Resistor D) Capacitor = max max V I X 12 L R C L X L ϖ = ( 29 2 2 L C Z R X X = + - 1 C X C ϖ = 200  L X L ϖ = = 1 100  C X C ϖ = = ( 29 2 2 112  L C Z R X X = + - = A Z V I gen 13 . 0 max = = X X L X X C R R
Physics 212  Lecture 21, Slide   Physics 212  Lecture 21, Slide  5 Peak AC Problems “Ohms” Law for each element – V gen = I Z – V Resistor = I R – V inductor = I X L – V Capacitor = I X C Typical Problem A generator with peak voltage 15 volts and angular frequency 25 rad/sec is connected in series with an 8  Henry inductor, a 0.004 Farad capacitor and a 50 ohm resistor. What is the peak current through the  circuit? Which element has the largest peak voltage across it? A) Generator E) All the same. B) Inductor C) Resistor D) Capacitor = max max V I X 12 L R C L X L ϖ = ( 29 2 2 L C Z R X X = + - 1 C X C ϖ = 200  L X L ϖ = = 1 100  C X C ϖ = = ( 29 2 2 112  L C Z R X X = + - = A Z V I gen 13 . 0

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Lectures_Lect21 - Physics 212 Lecture 21 Physics 212...

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