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Uttarakhand PMT Uttarakhand PMT Solved Paper-2005

  • question_answer
    If 1000 droplets each of potential 1 volt and radius r are mixed to form a big drop. Then the potential of the drop as compared to small droplets, will be:

    A)  1000 volt          

    B)  800 volt

    C)  100 volt          

    D)  20 volt

    Correct Answer: C

    Solution :

     Number of droplets\[n=1000\] voltage on the droplets = 1 volt The radius of each droplets \[=r\] The potential of the big drop\[=q\times {{n}^{2/3}}\]         \[=100\text{ }volt\]


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