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NEET Sample Paper NEET Sample Test Paper-60

  • question_answer
    Eight small drops, each of radius r and having same charge q are combined to form a big drop. The ratio between the potentials of the bigger drop and the smaller drop is:

    A) 8 : 1   

    B)               4 : 1   

    C) 2 : 1                 

    D) 1 : 8

    Correct Answer: B

    Solution :

    [b] When 8 small drops, each of radius r combined to form big drop \[{{V}_{2}}={{n}^{{}^{2}/{}_{3}}}\,{{V}_{1}}\] \[{{V}_{2}}={{(8)}^{{}^{2}/{}_{3}}}\,{{V}_{1}}\] \[{{V}_{2}}={{(2)}^{3\times \frac{2}{3}}}\,{{V}_{1}}\] \[\frac{{{V}_{2}}}{{{V}_{1}}}=\frac{4}{1}\]


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