2025年3月美国A卷 · 第 3 题

2025年3月美国A卷 · 原库模块 2 · Q3 原库参考解析

The potential difference across a capacitor in an electric circuit is initially 16 volts and decreases with time, as shown in the graph. Which of the following is closest to the time, in seconds, from the initial measurement at which the potential difference across the capacitor is 15% of its initial value?