JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2008

  • question_answer
        The specific charge of a proton is\[9.6\times {{10}^{7}}C\,k{{g}^{-1}}\]. The specific charge of an alpha particle will be

    A)  \[9.6\times {{10}^{7}}C\,k{{g}^{-1}}\]

    B)  \[19.2\times {{10}^{7}}C\,k{{g}^{-1}}\]

    C)  \[4.8\times {{10}^{7}}C\,k{{g}^{-1}}\]

    D)  \[2.4\times {{10}^{7}}k{{g}^{-1}}\]

    Correct Answer: C

    Solution :

                    Specific charge on ptoton\[={{\left( \frac{e}{m} \right)}_{p}}\] \[=9.6\times {{10}^{7}}C/kg\]specific charge on\[\alpha -\]particle, \[{{\left( \frac{q}{m} \right)}_{\alpha }}=\frac{2e}{4m}=\frac{1}{2}{{\left( \frac{e}{m} \right)}_{p}}=\frac{1}{2}\times 9.6\times {{10}^{7}}\]                 \[=4.8\times {{10}^{7}}C/kg\]


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