A) 2.2s
B) 1.1 s
C) 0.55 s
D) 0.48 s
Correct Answer: B
Solution :
Charge on capacitor \[Q=CV\] \[Q=8\times {{10}^{-6}}\times 400\] ?(i) Since, \[Q=It=\frac{V}{R}t\] \[Q=\frac{300}{0.1\times {{10}^{6}}}t\] ?(ii) Equate Eqs. (i) and (ii), we get \[\frac{300}{{{10}^{5}}}t=8\times {{10}^{-6}}\times 400\] \[t=\frac{8\times {{10}^{-6}}\times 400\times {{10}^{5}}}{300}\]\[=1.1\,s\]You need to login to perform this action.
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