NEET 2001 Physics question

Physics Dual Nature of Matter and Radiation NEET 2001

A photo-cell is illuminated by a source of light, which is placed at a distance d from the cell. If the distance become d/2, then number of electrons emited per second will be : -

(1)Remain same
(2)Four timesCorrect
(3)Two times
(4)One-fourth

Answer: (2)

Solution

The photoelectric current (number of photoelectrons emitted per second) is proportional to the intensity of incident light (the photon flux), while the frequency is unchanged. The intensity from a point

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Question ID VK-088781