PY208N-Lecture-26

PY208N-Lecture-26 - Physics 208N-004 Lecture #26 23 March...

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1 Physics 208N-004 Lecture #26 – 23 March 2011 Chapter 31: 3-10 Electromagnetic waves , 32: 4 Refraction Complete Chapter 30 and Review Inductor Inductive Reactance Capacitor Therefore, the current through an inductor lags the voltage by 90°. Therefore, in a capacitor, the current leads the voltage by 90°. Capacitive Reactance Resistor V o = I o [1/( C ) Voltage and current are in phase Analyzing the LRC series AC circuit is complicated, as the voltages are not in phase–this means we cannot simply add them. Furthermore, the reactances depend on the frequency. 30-8 LRC Series AC Circuit We calculate the voltage (and current) using what are called phasors – these are vectors representing the individual voltages.
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2 Here, at t = 0, the current and voltage are both at a maximum. As time goes on, the phasors will rotate counterclockwise. 30-8 LRC Series AC Circuit Some time t later, the phasors have rotated. The voltages across each
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This note was uploaded on 09/18/2011 for the course PY 208M 87878 taught by Professor George during the Spring '09 term at N.C. State.

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PY208N-Lecture-26 - Physics 208N-004 Lecture #26 23 March...

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