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12th Class Physics Electric Charges and Fields Question Bank MCQ - Electric Charges and Fields

  • question_answer
    If \[{{10}^{9}}\] electrons move out of a body to another body every second, then the time required to get a total charge of 1 C on the other body is:

    A) 250 years

    B) 100 years

    C) 198 years

    D) 150 years

    Correct Answer: C

    Solution :

    (c) 198 years The charge given out in one second \[=1.6\times {{10}^{-19}}C\times {{10}^{9}}=1.6\times {{10}^{-10}}C\] Time required to accumulate a charge of 1 C \[=\frac{1}{1.6\times {{10}^{-10}}}=6.25\times {{10}^{9}}s=198\]years


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