RAJASTHAN PMT Rajasthan - PMT Solved Paper-1995

  • question_answer
    Angular momentum of an electron revolving in \[{{\text{2}}^{\text{nd}}}\] orbit of radius r:

    A) \[\frac{h}{2\pi }\]                                            

    B)        \[\frac{h}{\pi }\]              

    C)        \[\frac{h}{\pi r}\]                                            

    D)        \[\frac{h}{2\pi r}\]

    Correct Answer: B

    Solution :

                    Angular momentum of electron \[=n\frac{h}{2\pi }\] For \[n=2\]angular momentum \[=2\times \frac{h}{2\pi }\] \[\therefore \]  angular momentum \[=\frac{h}{\pi }\]


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