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A 4 muF capacitor, a resistance of 2.5 M...

A `4 muF` capacitor, a resistance of `2.5 M Omega` is in series with `12V` battery. Find the time after which the potential difference across the capacitor is 3 times the potential difference across the resistor :

A

13.86 s

B

6.93 s

C

7 s

D

14 s

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