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NEET Sample Paper NEET Sample Test Paper-56

  • question_answer
    Eight oil drops of same size are charged to a potential of 50V each. These oil drops are merged into one single large drop. What will be the potential of the large drop?

    A) 50V                 

    B) 100V   

    C) 200V                

    D) 400V

    Correct Answer: C

    Solution :

    [c] \[8\times \frac{4}{3}\pi {{r}^{3}}=\frac{4}{3}\pi {{R}^{3}},R=2r\] \[Q=8q\] \[v=\frac{kq}{r}\] \[{{V}_{1}}=\frac{kQ}{R}=\frac{k(8q)}{2r}=4V(v=50\,volt)\] \[{{V}_{1}}=4\times 50=200V\]


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