일반물리학 2 — Circuits: Problem 21

21 Switch S in Fig. 27-32 is closed at time \(t = 0\), to begin charging an initially uncharged capacitor of capacitance \(C = 49.0 \mu\text{F}\) through a resistor of resistance \(R = 32.0 \Omega\). At what time is the potential across the capacitor equal to that across the resistor?