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The voltage 8.00 sin (400t) is applied to a series RLC circuit, with R = 200 Ω, L = 0.100 H, and C = 1.00 µF. What are the impedance Z and phase angle φ?

Question

The voltage 8.00 sin (400t) is applied to a series RLC circuit, with R = 200 Ω, L = 0.100 H, and C = 1.00 µF. What are the impedance Z and phase angle φ?

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Solution

Para resolver este problema, sigamos los siguientes pasos:

  1. Identificar los valores dados:

    • Voltaje: V(t)=8.00sin(400t) V(t) = 8.00 \sin(400t)
    • Resistencia: R=200Ω R = 200 \, \Omega
    • Inductancia: L=0.100H L = 0.100 \, H
    • Capacitancia: C=1.00μF=1.00×106F C = 1.00 \, \mu F = 1.00 \times 10^{-6} \, F
    • Frecuencia angular: ω=400rad/s \omega = 400 \, rad/s
  2. Calcular la reactancia inductiva (XLX_L): XL=ωL=400×0.100=40Ω X_L = \omega L = 400 \times 0.100 = 40 \, \Omega

  3. Calcular la reactancia capacitiva (XCX_C): XC=1ωC=1400×1.00×106=10.0004=2500Ω X_C = \frac{1}{\omega C} = \frac{1}{400 \times 1.00 \times 10^{-6}} = \frac{1}{0.0004} = 2500 \, \Omega

  4. Calcular la impedancia total (ZZ): La impedancia en un circuito RLC en serie se calcula como: Z=R2+(XLXC)2 Z = \sqrt{R^2 + (X_L - X_C)^2} Sustituyendo los valores: Z=2002+(402500)2=2002+(2460)2 Z = \sqrt{200^2 + (40 - 2500)^2} = \sqrt{200^2 + (-2460)^2} Z=40000+6051600=60916002468.1Ω Z = \sqrt{40000 + 6051600} = \sqrt{6091600} \approx 2468.1 \, \Omega

  5. Calcular el ángulo de fase (ϕ\phi): El ángulo de fase se calcula como: tan(ϕ)=XLXCR \tan(\phi) = \frac{X_L - X_C}{R} Sustituyendo los valores: tan(ϕ)=402500200=2460200=12.3 \tan(\phi) = \frac{40 - 2500}{200} = \frac{-2460}{200} = -12.3 ϕ=tan1(12.3)85.4 \phi = \tan^{-1}(-12.3) \approx -85.4^\circ

Por lo tanto, la impedancia ZZ es aproximadamente 2468.1Ω2468.1 \, \Omega y el ángulo de fase ϕ\phi es aproximadamente 85.4-85.4^\circ.

This problem has been solved

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