JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves JEE PYQ-Photo Electric Effect X-rays

  • question_answer
    This question has Statement 1 and Statement 2                              [JEE ONLINE 19-05-2012]
    Of the four choices given after the Statements, choose the one that best describes the two Statements.
    Statement 1: A metallic surface is irradiated by a monochromatic light of frequency \[\upsilon >{{\upsilon }_{0}}\] (the threshold frequency). If the incident frequency is now doubled, the photocurrent and the maximum kinetic energy are also doubled.
    Statement 2: The maximum kinetic energy of photoelectrons emitted from a surface is linearly dependent on the frequency of the incident light.
    The photocurrent depends only on the intensity of the incident light.

    A)                   Statement 1 is true, Statement 2 is true, Statement 2 is the correct explanation of Statement 1.

    B)             Statement 1 is false. Statement 2 is true.

    C)             Statement 1 is true, Statement 2 is false.

    D)             Statement 1 is true, Statement 2 is true, Statement 2 is not the correct explanation of Statement 1.

    Correct Answer: B

    Solution :

    [b] The maximum kinetic energy of photoelectrons depends upon frequency on incident light and photo current depends upon intensity of incident light.


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