NEET-XII-Physics

Previous Year Paper year:2020

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  • #157
    Light of frequency 1.5 times the threshold
    frequency is incident on a photosensitive material.
    What will be the photoelectric current if the
    frequency is halved and intensity is doubled ?
    (1) doubled
    (2) four times
    (3) one-fourth
    (4) zero
    digAnsr:   4
    Ans : 4