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  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-8

  • question_answer
    Light of wavelength \[\lambda \]strikes a metal surface with intensity ?x? and the metal emits ?y? electrons per second of maximum energy ?z?. What will happen to y and ?z? if ?x? is halved?

    A)  y will remain same         

    B)  y will be doubled

    C)  z will remain the same

    D)  z will halved

    Correct Answer: C

    Solution :

     Maximum kinetic energy of the photoelectron is independent on intensity of radiation. No. of electrons emitted per second will be halved if the intensity of light striking on the surface halves.


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