JEE Main & Advanced Physics Atomic Physics Question Bank Topic Test - Atomic Physics

  • question_answer
    The velocity of an electron in the second orbit of sodium atom (atomic number = 11) is v. The velocity of an electron in its fifth orbit will be                        

    A) v

    B) \[\frac{22}{5}v\]

    C) \[\frac{5}{2}v\]

    D) \[\frac{2}{5}v\]

    Correct Answer: D

    Solution :

    [d] vn \[\propto \frac{1}{n}\] Þ \[\frac{{{v}_{5}}}{{{v}_{2}}}=\frac{2}{5}\Rightarrow {{v}_{5}}=\frac{2}{5}{{v}_{2}}=\frac{2}{5}v\]
     


You need to login to perform this action.
You will be redirected in 3 sec spinner