Physics - Capacitor Question with Solution | TestHub

In the following circuit, initially switch S was closed for long time. Switch is opened at $\mathrm{t}=0$. If the current through battery is $\mathrm{n}\times 0.67$ ampere [at $\mathrm{t}=\mathrm{CR}\ln 2$ ], then find n Take $\mathrm{V}=12$ volt, $\mathrm{R}=4$ ohm, $\mathrm{C}=1$ micro Farad ( take $2^{\frac{-1}{4}}=0.84$ )