CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2007

  • question_answer
    The volume of a nucleus is directly proportional to

    A)  A                                           

    B)  \[{{A}^{3}}\]

    C)  \[\sqrt{A}\]                                      

    D)  \[{{A}^{1/3}}\] (where A = mass number of the nucleus)

    Correct Answer: A

    Solution :

    Radius of nucleus \[R={{R}_{0}}{{A}^{1/3}}\] where   \[{{R}_{0}}=1.2\times {{10}^{-15}}m\] Volume of nucleus \[(V)=\frac{4}{3}\pi {{R}^{3}}\]                                 \[=\frac{4}{3}\pi \,{{[{{R}_{0}}{{A}^{1/3}}]}^{3}}\]                                 \[=\frac{4}{3}\pi \,R_{0}^{3}A\] \[\therefore \]                  \[V\propto A\]


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