153. When the net reactance in a series coil-capacitor circuit is zero at frequency f, the nature of its reactance of frequency 2f is

5. The following circuit can be used as part of a loudspeaker crossover network. These networks can be pictured as frequency sensitive voltage dividers. This circuit allows low frequency tones to go into the low frequency transducer labeled here as "Loudspeaker", a.k.a. woofer. The crossover frequency is the frequency f at which the reactance magnitude equals the woofer's resistance.

5b) Find P F, S, and Q at 2000 Hz for an harmonic wave (i.e. sinusoidal signal) with a peak amplitude of 1V.

5. The following circuit can be used as part of a loudspeaker crossover network. These networks can be pictured as frequency sensitive voltage dividers. This circuit allows low frequency tones to go into the low frequency transducer labeled here as "Loudspeaker", a.k.a. woofer. The crossover frequency is the frequency f at which the reactance magnitude XL. equals the woofer's resistance.

If the woofer resistance is: R = 4 and L=1 mH.

The following three impedances are connected in series across a 40 V, 20 kHz supply: a 
resistance of 8 Ω, a coil of inductance 130 μH and 5 Ω resistance, and a 10 Ω resistor in 
series with a 0.25 µF capacitor. Sketch a neat diagram representing this network, and 
calculate:
5.1.1 The inductive and capacitive reactance’s. (4)
5.1.2 The magnitude and phase angle of the circuit impedance. (4)
5.1.3 The voltage drops across resistance, inductance and capacitance.