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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2013

  • question_answer
    The electric potential at the surface of an atomic nucleus\[(z=50)\]of radius\[9\times {{10}^{-15}}m\] is

    A)  80V                                      

    B)  \[8\times {{10}^{6}}V\]

    C)  9V                                         

    D)  \[9\times {{10}^{5}}V\]

    Correct Answer: B

    Solution :

                    \[V=\frac{I}{4\pi {{\varepsilon }_{0}}}.\frac{q}{R}\]          \[\because \]     \[(q=z)\] \[=9\times {{10}^{9}}\times \frac{50\times 1.6\times {{10}^{-19}}}{9\times {{10}^{-15}}}\] \[=8\times {{10}^{6}}V\]


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