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NEET Sample Paper NEET Sample Test Paper-52

  • question_answer
    In coolidge tube experiment, if applied voltage is increased to three times, the short wavelength limit of continuous X-ray spectrum shifts by 20 pm. What is the initial voltage applied to the tube?

    A) 20 kV               

    B) 41 Kv

    C) 52 kV               

    D) 102 kV

    Correct Answer: B

    Solution :

    \[\frac{hc}{e{{V}_{0}}}\,\,=\,\,\lambda \,and\,\,\frac{hc}{3e{{V}_{0}}}\,=\,\,\lambda -\Delta \lambda \] \[\Rightarrow \,\,{{V}_{0}}\,\,=\,\,\frac{2hc}{3e\Delta \lambda }\,\,=\,\,41\,\,kV\]


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