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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2002

  • question_answer
    In the Bohr model of the hydrogen atom, let R, V and E represent the radius of the orbit, the speed of electron and the total energy of the electron respectively. Which of the following quantity is proportional to the quantum number\[n\]?

    A) \[E/V\]                

    B) \[R/E\]

    C)  \[VR\]                                 

    D)  \[RE\]

    Correct Answer: C

    Solution :

    Mean life \[=\frac{1}{\lambda }\] \[{{T}_{(1/2)}}=\frac{0.693}{\lambda }\] \[{{T}_{(1/2)}}=0.693(l)\]mean life                 \[69.3%.\]


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