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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 44

  • question_answer
    A photo sensitive material would emit electrons if excited by photons beyond a threshold. To overcome the threshold, one would increase-

    A) Voltage applied to the light source

    B) Intensity of light

    C) Wavelength of light

    D) The frequency of light

    Correct Answer: D

    Solution :

    [d] By theory for photo electric effect \[V>{{V}_{0}}.\]


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