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NEET Sample Paper NEET Sample Test Paper-18

  • question_answer
    Radiations of frequency v are incident on a photo sensitive metal. The maximum kinetic energy of the photo electrons is E. When the frequency of the incident radiations is doubled, what is the maximum kinetic energy of the photoelectrons?

    A)  2E                  

    B)  4E

    C)  \[E+hv\]                    

    D) \[E-hv\]

    Correct Answer: C

    Solution :

    \[hv-{{\phi }_{0}}=E\]and\[h(2v)-{{\phi }_{0}}=E'\] \[\Rightarrow \]\[E'-E=hv\]\[\therefore \]\[E'=E+hv\] Hence, the correction option is [c].


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