AC Circuit Resonance Angular Frequency Calculation

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SUMMARY

The resonance angular frequency for an L-R-C series circuit with an inductance (L) of 0.270 H and a capacitance (C) of 3.80 µF is calculated using the formula ω = 1/√(LC). The voltage amplitude of the source is 120 V, but it does not affect the resonance frequency calculation. The impedance at resonance is minimized, leading to a condition where the inductive reactance (XL) equals the capacitive reactance (XC). This results in the equation ω = 1/√(0.270 H * 3.80 µF).

PREREQUISITES
  • Understanding of L-R-C circuit components and their functions
  • Familiarity with angular frequency (ω) and its significance in resonance
  • Knowledge of impedance in AC circuits
  • Basic algebra for solving equations involving square roots
NEXT STEPS
  • Calculate the resonance angular frequency using the formula ω = 1/√(LC)
  • Explore the concept of impedance in AC circuits and its role in resonance
  • Investigate the phase relationships between voltage and current in L-R-C circuits
  • Learn about the effects of varying L and C on resonance frequency
USEFUL FOR

Students studying electrical engineering, physics enthusiasts, and anyone interested in understanding AC circuit resonance and its calculations.

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Homework Statement



In an L-R-C series circuit, L = 0.270 H and C = 3.80 µF. The voltage amplitude of the source is 120 V.
(a) What is the resonance angular frequency of the circuit?



Homework Equations



Xc = 1/(wC)

XL = wL

w=angular frequency

The Attempt at a Solution



I couldn't get anywhere. I know that I have to do something with the voltage, but I have no clue
 
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Well you want the magnitude of the impedance to go to 0. And since they are both 180 degrees out of phase with each other and in series, you treat them like vectors and subtract them. Then solve for [tex]\omega[/tex].
 

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