일반물리학 2 — Electromagnetic Oscillations and Alternating Current: Problem 25

25 Remove the inductor from the circuit in Fig. 31-7 and set $R = 400 \Omega$, $C = 15.0 \mu\text{F}$, $f_d = 30.0 \text{ Hz}$, and $\mathcal{E}_m = 72.0 \text{ V}$. What are (a) $Z$, (b) $\phi$, and (c) $I$? (d) Draw a phasor diagram.