In an L-R-C series ac circuit, the source has a voltage amplitude of 240 V, R = 90.0 Ω, and the reactance of the inductor is 320 Ω. The voltage amplitude across the resistor is 135 V. (a) What is the current amplitude in the circuit? (b) What is the voltage amplitude across the inductor? (c) What two values can the reactance of the capacitor have? (d) For which of the two values found in part (c) is the angular frequency less than the resonance angular frequency? Explain.
In an L-R-C series ac circuit, the source has a voltage amplitude of 240 V, R = 90.0 Ω, and the reactance of the inductor is 320 Ω. The voltage amplitude across the resistor is 135 V. (a) What is the current amplitude in the circuit? (b) What is the voltage amplitude across the inductor? (c) What two values can the reactance of the capacitor have? (d) For which of the two values found in part (c) is the angular frequency less than the resonance angular frequency? Explain.
In an L-R-C series ac circuit, the source has a voltage amplitude of 240 V, R = 90.0 Ω, and the reactance of the inductor is 320 Ω. The voltage amplitude across the resistor is 135 V. (a) What is the current amplitude in the circuit? (b) What is the voltage amplitude across the inductor? (c) What two values can the reactance of the capacitor have? (d) For which of the two values found in part (c) is the angular frequency less than the resonance angular frequency? Explain.
In an L-R-C series ac circuit, the source has a voltage amplitude of 240 V, R = 90.0 Ω, and the reactance of the inductor is 320 Ω. The voltage amplitude across the resistor is 135 V. (a) What is the current amplitude in the circuit? (b) What is the voltage amplitude across the inductor? (c) What two values can the reactance of the capacitor have? (d) For which of the two values found in part (c) is the angular frequency less than the resonance angular frequency? Explain.
A resistor and capacitor are connected in series across an ac generator. The voltage of the generator is
given by V(t) = Vo cos(wt), where Vo
What is the magnitude of the impedance of the RC circuit? (b) What is the amplitude of the current
through the resistor? (c) What is the phase difference between the voltage and current?
120 V, w =
120T rad/s, R = 600N, and C = 4.5µF. (a)
Hint
a. The magnitude of the impedance is
Ω.
b. The amplitude of the current through the resistor is
mA.
c. The phase difference between the voltage and current is
rad. (Take the
positive phase difference to mean that voltage is leading the current by this phase difference.)
A circuit consists of an inductor and resistor in series with an AC voltage source, as shown. If VAC max = 12 V, Imax = 2.0 A, and the current lags the voltage by a phase angle φ = 42°, what is the average power dissipated in the circuit?
18 W
24 W
9 W
12
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