Resistor–Capacitor (RC) Circuits Practice Test

An uncharged capacitor is connected to a battery through a resistor, so the capacitor is charging. Which statement best describes the capacitor’s voltage $V_C$ at long times?

A capacitor has been fully charged to $12\ \text{V}$. At $t=0$, the battery is removed and the capacitor is connected across a single $4.0\ \text{k}\Omega$ resistor, so it is discharging. Which statement best describes the voltage across the resistor as time increases?