A photocell employs photoelectric effect to convert

Options

A. change in the frequency of light into a change in electric voltage
B. change in the intensity of illumination into a change into a change in photoelectric current
C. change in the intensity of illumination into a change in the work function of the photocathode
D. change in the frequency of light into a change in the electric current

Answer

B

Explanation

In a photoelectric effect when monochromatic radiations of suitable frequency fall on the photosensitive plate called cathode , the photoelectrons are emitted which get accelerated towards anode. These electrons flow in the outer circuit resulting in the photoelectric current .
Using the incident radiations of a fixed frequency , it is found that the photoelectric current increases linearly with the intensity of incident light as shown in the figure . Hence , a photocell employs photoelectric effect to convert change in the intensity of illumination into a change in photoelectric current.