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NEET Sample Paper NEET Sample Test Paper-80

  • question_answer
    What is the value of de-Broglie wavelength for an a-particle having mass \[6.6 \times  1{{0}^{27}}kg\] moving with a speed of \[1{{0}^{5}}cm{{s}^{-}}^{1}\]?

    A)  \[2 \,\times \, 1{{0}^{-12}}\,m\]                       

    B)  \[3 \,\times \, 1{{0}^{-10}}\,m\]

    C)  \[1 \,\times \, 1{{0}^{-10}}\,m\]                       

    D)  \[2 \,\times \, 1{{0}^{-10}}\,m\]

    Correct Answer: C

    Solution :

    According to de-Broglie relation,\[\lambda =\frac{h}{mv}=\frac{6.6\times {{10}^{-\,34}}\,Js}{6.6\times {{10}^{-\,27}}\,kg\times {{10}^{3}}m{{s}^{-\,1}}}\]\[=\,\,\,1\,\,\times 1{{0}^{-\,10}}m\]


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