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RAJASTHAN ­ PET Rajasthan PET Solved Paper-2002

  • question_answer
    The velocity of an electron in the second orbit of sodium atom (atomic number = 1, 1) is v. The velocity of an electron in its fifth orbit will be

    A)  \[v\]

    B)  \[\frac{22}{5}v\]

    C)  \[\frac{3}{2}v\]

    D)  \[\frac{2}{5}v\]

    Correct Answer: D

    Solution :

     Velocity of nth orbit \[v\propto \frac{1}{n}\] \[\frac{{{v}_{5}}}{{{v}_{2}}}=\frac{2}{5}\] \[\Rightarrow \] \[{{v}_{5}}=\frac{2}{5}{{v}_{2}}\]


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