A simple RC circuit consists of a 2-μF capacitor in series with a 2000-Ω resistor, a 12-V battery, and an open switch. Initially, the capacitor is uncharged. How long after the switch is closed will the voltage across the capacitor be 80% of its maximum value?
3 × 10–4 s
6.44 × 10–3 s
3.45 × 10–3 s
7.35 × 10–4 s
3.21 × 10–3 s