A resistor, an uncharged capacitor, a dc voltage source, and an open switch are all connected in series. The switch is closed at time t = 0 s. Which one of the following is a correct statement about this circuit? The voltage on the capacitor after one time constant is 1/e of the maximum value. The charge on the capacitor after four time constants is about 98% of the maximum value. The charge on the capacitor after one time constant is 50% of its maximum value. The voltage on this capacitor after one time constant is 100% of its maximum value. The charge on the capacitor after one time constant is 1/e of its maximum value.