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AMU Medical AMU Solved Paper-2015

  • question_answer
    If the kinetic energy of a particle is reduced to one - fourth then the percentage increase in the de - Broglie wavelength is

    A)  41%                                      

    B)  100%

    C)  144%                                   

    D)  200%

    Correct Answer: B

    Solution :

                     If KE of a particle reduced to one fourth, then                 \[\lambda =\frac{h}{\sqrt{8\,m\,(KE)/4}}\]                 \[=\frac{2h}{\sqrt{2m\,KE}}\] Hence, increase in the de-Broglie wavelength is 100%.


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