A capacitor C is connected in series with a resistor R across a battery and an open switch. If a second capacitor of capacitance 2C is connected in series with the first one, the time constant of the
New RC circuit will be
A) smaller than before.
B) variable.
C) larger than before.
D) the same as before.

Question

Quizplus · Accepted Answer

When a second capacitor of capacitance 2C is connected in series with the first one, the equivalent capacitance of the series combination is less than the original capacitance C, which results in a smaller time constant for the RC circuit.

A Capacitor C Is Connected in Series with a Resistor