Question

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? a. 0.43 b. 0.85 c. 1.71 d. 3.41

Explanation:

Step1: Identify the initial potential difference

The initial potential difference $V_0 = 16$ volts. We want to find the time when $V = 0.15V_0$. So $V=0.15\times16 = 2.4$ volts.

Step2: Read the time from the graph

By looking at the graph of potential - difference versus time, we find the time value corresponding to the potential - difference of approximately $2.4$ volts. When we read the graph, the time value is closest to $3.41$ seconds.

Answer:

d. 3.41