Capacitance and EMI
Electricity and Magnetism
Level
2
An uncharged capacitor of capacitance 4 micro farad , a battery of emf 12V and a resistor of 2.5M Ohm are connected in series. The time after which VC = 3VR is ?
6.93s
14s
7s
13.86s
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1 solution
okay so i solved with a rather crude way if anyone has more better solutions please post them V=IR and V=3CV(1-e^-t/rc) equating these we will get the answer