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JEE Main & Advanced JEE Main Paper (Held On 26 May 2012)

  • question_answer
    Photoelectrons are ejected from a metal when light of frequency u falls on it. Pick out the wrong statement from the following.   JEE Main Online Paper (Held On 26-May-2012)  

    A)  No electrons are emitted if o is less than W/h, where W is the work function of the metal

    B)                         The ejection of the photoelectrons is instantaneous.

    C)                         The maximum energy of the photo electrons is\[h\upsilon .\]

    D)                        The maximum energy of the photoelectrons is independent of the intensity of the light.

    Correct Answer: C

    Solution :

                    According to photo-electric equation : \[K.{{E}_{\max }}=hv-h{{v}_{0}}\] (Work function) Some sort of energy is used in ejecting the photoelectrons.


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