A 4 mF capacitor, a resistance of 2.5 MW is in series with 12 V batter – McqOptions

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1.	A 4 mF capacitor, a resistance of 2.5 MW is in series with 12 V battery. Find the time after which the potential difference across the capacitor is 3 times the potential difference across the resistor. [Given ln(2)= 0.693] [IIT-JEE (Screening) 2005]
A.	13.86 s
B.	6.93 s
C.	7 s
D.	14 s
Answer» B. 6.93 s

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