A Resistor, an Uncharged Capacitor, a Dc Voltage Source, and an Open

question 137

Multiple Choice

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?

• A) The charge on the capacitor after one time constant is 1/e of its maximum value.
• B) The charge on the capacitor after four time constants is about 98% of the maximum value.
• C) The voltage on this capacitor after one time constant is 100% of its maximum value.
• D) The voltage on the capacitor after one time constant is 1/e of the maximum value.
• E) The charge on the capacitor after one time constant is 50% of its maximum value.

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