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MGIMS WARDHA MGIMS WARDHA Solved Paper-2007

  • question_answer
    A 30 \[\pi F\] capacitor is charged by a constant current of 30 mA. If the capacitor is initially uncharged, how long does it take for the potential difference to reach 400 V?

    A) 0.2s                                       

    B) 0.4s

    C) 0.6s                                       

    D) 0.8s

    Correct Answer: B

    Solution :

    \[I=\frac{Q}{t}=\frac{CV}{t}\] \[\Rightarrow \]               \[t=\frac{CV}{I}=\frac{30\times {{10}^{-6}}\times 400}{30\times {{10}^{-3}}}=0.4s\]


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