NEET 2006 Physics question

A photo-cell employs photoelectric effect to convert:-

(1)Change in the frequency of light into a change in electric voltage
(2)Change in the intensity of illumination into a change in photoelectric currentCorrect
(3)Change in the intensity of illumination into a change in the work function of the photocathode
(4)Change in the frequency of light into a change in the electric current

Answer: (2)

Solution

In a photocell, the photoelectric current (for frequency above the threshold frequency) is directly proportional to the intensity of the incident light. So a photocell converts a change in the intensity of illumination into a change in

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Question ID VK-089556