192. The curve between current and frequency is termed as

4.1 The current in an ac circuit at any time 𝑡 seconds is given by: 𝑖(𝑡) = 120 sin(100𝜋𝑡 +
0.36) amperes. Determine:
4.1.1 The peak value, the periodic time, the frequency and phase angle relative to
120 sin(100𝜋𝑡). 
4.1.2 The value of the current when 𝑡 = 0. 
4.1.3 The time when the current first reaches 60 A. 
4.1.4 The time when the current is first at maximum. 

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.