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Q. The graph that depicts Einstein’s photoelectric effect for a monochromatic source of frequency above the threshold frequency is

KVPYKVPY 2016Structure of Atom

Solution:

According to photoelectric effect, the number of electrons ejected is proportional to the intensity of radiation. Thus on increasing the intensity of radiation, the value of photoelectric current also increases, i.e. photoelectric current $\propto$ intensity of radiation. Hence, its graph would be linear.
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