A Capacitor C Is Connected in Series with a Resistor

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 parallel with the first one, the time constant of
The new RC circuit will be

A) one-fourth as large as before.
B) three times a large as before.
C) the same as before.
D) twice as large as before.
E) one-half as large as before.

Correct Answer:

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