RAJASTHAN ­ PET Rajasthan PET Solved Paper-2005

  • question_answer
    An electron is accelerated through a potential of 50000 V. Its de-Broglie wavelength of electron will be

    A)  0.55\[\overset{o}{\mathop{\text{A}}}\,\]               

    B)  0.055\[\overset{o}{\mathop{\text{A}}}\,\]

    C)  0.077\[\overset{o}{\mathop{\text{A}}}\,\]           

    D)  0.095\[\overset{o}{\mathop{\text{A}}}\,\]

    Correct Answer: B

    Solution :

     \[\lambda =\frac{12.27}{\sqrt{V}}=\frac{12.27}{\sqrt{50000}}=0.055\overset{o}{\mathop{\text{A}}}\,\]


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