일반물리학 2 — Electromagnetic Oscillations and Alternating Current: Problem 29

29 In an RLC circuit such as that of Fig. 31-7 assume that $R = 12.0\ \Omega$, $L = 60.0\ \text{mH}$, $f_d = 60.0\ \text{Hz}$, and $\mathscr{E}_m = 30.0\ \text{V}$. For what values of the capacitance would the average rate at which energy is dissipated in the resistance be (a) a maximum and (b) a minimum? What are (c) the maximum dissipation rate and the corresponding (d) phase angle and (e) power factor? What are (f) the minimum dissipation rate and the corresponding (g) phase angle and (h) power factor?