A capacitor of 2.5 μF is charged through a resistor of 4 MΩ. In how much time will potential drop across capacitor will become 3 times that of resistor (ln2=0.693)

Options

(a) 13.86 sec
(b) 6.93 sec
(c) 1.386 sec
(d) 69.3 sec

Correct Answer:

13.86 sec

Explanation:

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