15.5 Exercise 1

In the circuit of the reference, $L = 2.0 \times 10^{−3} \text{H},$ $C = 5.0 \times 10^{−4} \text{F},$ and $R = 40 \Omega .$ (a) What is the resonant frequency? (b) What is the impedance of the circuit at resonance? (c) If the voltage amplitude is 10 V, what is i(t) at resonance? (d) The frequency of the AC generator is now changed to 200 Hz. Calculate the phase difference between the current and the emf of the generator.