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NEET Sample Paper NEET Sample Test Paper-26

  • question_answer
    In the X-rays tube before striking the target, we accelerate the electrons through a potential difference of V volt. For which of the following value of V, we will have X-rays of largest wavelength?

    A)  \[10\,KV\]           

    B)  \[20\,KV\]

    C)  \[30\,KV\]                   

    D)  \[40\,KV\]

    Correct Answer: A

    Solution :

    As,         \[\frac{hc}{\lambda }=eV\] \[\therefore \]  \[\lambda =\frac{hc}{eV}\]                 \[\lambda \propto \frac{1}{V}\]           


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