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JEE Main & Advanced Physics Atomic Physics Question Bank Atomic Structure

  • question_answer
    Consider an electron in the nth orbit of a hydrogen atom in the Bohr model. The circumference of the orbit can be expressed in terms of the de Broglie wavelength \[\lambda \]of that electron as              [CBSE PMT 1990]

    A)            \[(0.259)\ n\lambda \]     

    B)            \[\sqrt{n}\lambda \]

    C)            \[(13.6)\ \lambda \]          

    D)            \[n\lambda \]

    Correct Answer: D

    Solution :

                       According to Bohr?s theory \[mvr=n\frac{h}{2\pi }\]            Þ Circumference \[2\pi r=n\,\left( \frac{h}{mv} \right)=n\lambda \]


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