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MGIMS WARDHA MGIMS WARDHA Solved Paper-2004

  • question_answer
    The minimum wavelength of X-rays emitted by X-ray tube is 0.4125 A. The accelerating voltage is :

    A) 30 kV                                    

    B) 50 kV

    C) 80 kV                                    

    D) 60 kV

    Correct Answer: A

    Solution :

    From the formula \[eV=\frac{hc}{\lambda }\] \[V=\frac{hc}{e\lambda }\]                 \[=\frac{6.6\times {{10}^{-34}}\times 3\times {{10}^{8}}}{1.6\times {{10}^{-19}}\times 0.4125\times {{10}^{-10}}}\]                 \[=30\times {{10}^{3}}volt\]                 \[=30\,kV\]


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