P219lecture13RLCcircuits

# P219lecture13RLCcircuits - Goal To understand RLC circuits...

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Goal: To understand RLC circuits Objectives: 1) To understand how Impedance compares to resistance 2) To learn how to calculate Voltage and Current from Impedance 3) To learn about Resonance 4) To be able to calculate the Phase Angle of a circuit 5) To learn the differences in calculating Power in a RLC circuit vs a circuit with resistors

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Impedance Impedance is the effective resistance of a RLC circuit. However, each part of the circuit is in a different part of the cycle – or in a different phase. So, the exact voltages (and therefore resistances) across any component in the circuit varies. However, there is a overall solution. Z = (R 2 + (X L – X C ) 2 ) 1/2 Z is called the Impedance. Note if X L – X C = 0 then Z = R
Sample X L = wL and X C = 1/(wC) You have a 12 Vrms and 60 Hz power source hooked up in series to a 0.05 H inductor, 5 Ω resistor, and 0.01 F capacitor. What is the impedance of this circuit?

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Sample • X L = wL and X C = 1/(wC) You have a 10 Vrms and 50 Hz power source hooked up in series to a 0.04 H inductor, 5 Ω resistor, and 0.01 F capacitor.
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