An RC circuit is connected across a DC voltage source through an open switch. As soon as the switch is closed, the capacitor charges linearly as a function of time.

Question

Quizplus · Accepted Answer

As soon as the switch is closed, the capacitor starts to charge exponentially, not linearly. The voltage across the capacitor increases towards the DC voltage source voltage, but the rate at which it charges decreases as the capacitor charges up. Therefore, the charging curve is exponential, not linear.

An RC Circuit Is Connected Across a DC Voltage Source