JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Self Evaluation Test - Dual Nature of Radiation and Matter

  • question_answer
    If an electron is accelerated through a potential difference 150 volt, its de-Broglie wavelength is:

    A) \[\text{1}\overset{\text{o}}{\mathop{\text{A}}}\,\]

    B) \[\text{100}\overset{\text{o}}{\mathop{\text{A}}}\,\]

    C) \[\text{5000}\overset{\text{o}}{\mathop{\text{A}}}\,\]

    D) \[\text{90000}\overset{\text{o}}{\mathop{\text{A}}}\,\]

    Correct Answer: A

    Solution :

    [a] Not Available \[\lambda =\frac{h}{\sqrt{2meV}}={{\left( \frac{150}{V} \right)}^{\frac{1}{2}}}{{\text{A}}^{\text{o}}}={{\left( \frac{150}{150} \right)}^{\frac{1}{2}}}{{\text{A}}^{\text{o}}}=1{{\text{A}}^{\text{o}}}\]


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