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MGIMS WARDHA MGIMS WARDHA Solved Paper-2014

  • question_answer
    A body of mass\[x\text{ }kg\]is moving with a velocity of\[100\text{ }m{{s}^{-1}}\]. Its   de-Broglie wavelength is\[6.62\times {{10}^{-35}}m\]. Hence,\[x\]is \[[h=6.62\times {{10}^{-34}}Js]\]

    A)  0.1 kg                  

    B)  0.25 kg

    C)  0.15 kg                

    D)  0.2 kg

    Correct Answer: A

    Solution :

                    \[\lambda =\frac{h}{mv}\] \[\therefore \]  \[m=\frac{6.62\times {{10}^{-34}}}{6.62\times {{10}^{-35}}\times 100}=0.1\,kg\]


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