2. Sample Papers
  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-28

  • question_answer
    The intensity of X-rays from a coolidge tube is plotted against wavelength \[\lambda \] as shown in figure. The minimum wavelength found is \[{{\lambda }_{C}}\] and the wavelength of the \[{{K}_{a}}\] lines is \[{{\lambda }_{K}}\] the accelerating voltage is increased.             

    A)  \[{{\lambda }_{K}}-{{\lambda }_{C}}\] increase                

    B)  \[{{\lambda }_{K}}-{{\lambda }_{C}}\] decrease

    C)  \[{{\lambda }_{K}}\] increase                   

    D)  \[{{\lambda }_{K}}\] decrease

    Correct Answer: A

    Solution :

    As the accelerating voltage is increased, \[{{\lambda }_{c}}=\frac{hc}{eV}\]decreases but \[{{\lambda }_{K}}\] remains the same\[\therefore {{\lambda }_{K}}-{{\lambda }_{C}}\]increase.


You need to login to perform this action.
You will be redirected in 3 sec spinner