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Q.

In photoelectric effect the number of photo-electrons emitted is proportional to

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a

 intensity of incident beam

b

frequency of incident beam

c

 velocity of incident beam

d

 work function of photo cathode

answer is A.

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Detailed Solution

 By increasing the insincerity of incident beam, the number of emitted photo-electrons can be increased. Hence number of photo-electrons emitted is proportional to the intensity of incident beam,

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In photoelectric effect the number of photo-electrons emitted is proportional to