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Chapter 21: RLC Circuits - Department of Physics

PHY2054: Chapter 211 Chapter 21: RLC CircuitsPHY2054: Chapter 212 Voltage and Current in RLC Circuits AC emf source: driving frequency f If circuit contains only R + emf source, current is simple If L and/or C present, current is notin phase with emf Z, shown later()sinmmmiItIZ = =sinmt =2f =()()sincurrent amplitudemmmiI tIRR ===PHY2054: Chapter 213AC Source and Resistor Only Driving voltage is Relation of current and voltage Current is in phasewith voltage ( = 0)i R~sinmmmiIt IR ==sinmt =/iR =PHY2054: Chapter 214AC Source and Capacitor Only Voltage is Differentiate to find current Rewrite using phase (check this!)

PHY2054: Chapter 21 24 Quiz ÎA generator produces current at a frequency of 60 Hz with peak voltage and current amplitudes of 100V and 10A, respectively. What is the average power produced if they are in phase? (1) 1000 W (2) 707 W (3) 1414 W (4) 500 W (5) 250 W 1 P ave peak peak rms rms== 2 εεII

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Transcription of Chapter 21: RLC Circuits - Department of Physics

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