일반물리학 2 — Electromagnetic Oscillations and Alternating Current: Problem 13

13 Remove the capacitor from the circuit in Fig. 31-7 and set $R = 400 \ \Omega$, $L = 230 \text{ mH}$, $f_d = 120 \text{ Hz}$, and $\mathcal{E}_m = 72.0 \text{ V}$. What are (a) $Z$, (b) $\phi$, and (c) $I$? (d) Draw a phasor diagram.