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NEET Sample Paper NEET Sample Test Paper-17

  • question_answer
    One of the line spectra emitted from the X-ray tube is \[10\overset{\text{o}}{\mathop{\text{A}}}\,.\] What is the energy level difference in the emitting atom that is responsible for X-rays?

    A)  24.8 eV                      

    B)  12.4 eV                      

    C)  6.2 eV                        

    D)  10.2 eVs                    

    Correct Answer: B

    Solution :

    \[\lambda =\frac{hc}{eV}=\frac{1240}{v}\,nm\] \[100=\frac{1240}{v}\]or \[V=\frac{1240}{100}=12.4V\] \[\therefore \]    \[E=eV=12.4\,eV\] Hence, the correction option is [b].


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